An introduction to the modern theory of valency
Speakman, J. Clare (James Clare)
New York. Longmans, Green & co.. 1935. vii, 157 p. incl. tables, diagrs. 19 cm..

An introduction to the Monte Carlo method and its application to engineering problems
Adam, William Thomas.
1957. 1 v. in various pagings : ill. ; 30 cm..

An introduction to the moon
Salisbury, John W.
Bedford, Mass. Research Instrumentation Laboratory, Geophysics Research Directorate, AF Cambridge Research Laboratories, Air Force Research Division (ARDC) U.S. Air Force. 1960. 30 p. fold. col. plate. 28 cm..

An introduction to the morphology and classification of the Foraminifera (with 16 plates)
Cushman, Joseph A. (Joseph Augustine)
Washington. The Smithsonian Institution. 1925. 77 p. illus., 16 plates on 8 leaves 25 cm..

An introduction to the most authoritative history of music on records [sound recording]
S.l.]. Archive Production. 1964. 1 sound disc : 33 1/3 rpm, stereo. ; 12 in..

An introduction to the multinationals
Ghertman, Michel. ; Allen, Margaret
New York. St. Martin's Press. 1984. vi, 143 p. ; 23 cm..
ISBN 0312433042 :

An introduction to the music of Milton Babbitt
Mead, Andrew Washburn.
Princeton, N.J. Princeton University Press. 1994. 321 p. : ill., music ; 25 cm..
ISBN 0691033145 :

An introduction to the music of R. Vaughan Williams
Dickinson, A. E. F. (Alan Edgar Frederic)
London. Oxford university press, H. Milford. 1928. 83, [1] p. illus. (music) 17 cm..

An introduction to the natural history of the terrestrial sphere
Raspe, Rudolf Erich
New York. Hafner Pub. Co.. 1970. cxvii, 190, xxii, 191 p. illus., facsims., maps, port. 22 cm..

An introduction to the New Testament
Lake, Kirsopp ; Lake, Silva Tipple
"First edition.". New York. Harper and brothers. 1937. x, 302 p. maps, diagrs. 23 cm..

An introduction to the New Zealand economy
Easton, B. H. ; Thomson, Norman J.
St. Lucia, Queensland. University of Queensland Press. 1982. xvi, 339 p. : ill. ; 23 cm..
ISBN 0702219207

An Introduction to the numerical analysis of semiconductor devices and integrated circuits
Miller, John J. H.
Dublin. Boole Press. 1981. viii, 75 p. : ill. ; 24 cm..
ISBN 0906783046 (pbk.)

An introduction to the numerical analysis of spectral methods
Mercier, Bertrand
Berlin. Springer-Verlag. 1989. v, 154 p. ; 25 cm..
ISBN 0387511067 (U.S.) :

An introduction to theology
Bell, Hermon F. (Hermon Fiske)
New York. Published by the author. 1924. 205 p. 20 cm..

An introduction to the operational calculus
Seeley, Walter J. (Walter James)
1st ed.. Scranton, Pa. International textbook company. 1941. xi p., 1 l., 167 p. diagrs. 22 cm..

An introduction to the operations with series
Schwatt, Isaac J. (Isaac Joachim)
Philadelphia. The Press of the University of Pennsylvania. 1924. x, 287 p. 25 cm..

An introduction to the optical microscope
Bradbury, Savile.
New York. Oxford University Press. 1984. 85 p. : ill. ; 24 cm..
ISBN 0198564015 (pbk.) :

An introduction to the optical spectroscopy of inorganic solids
García Solé, J. (José) ; Bausá, L. E. (Louisa E.) ; Jaque, D. (Daniel)
Chichester, England. J. Wiley. 2005. xiii, 283 p. : ill. ; 23 cm..
ISBN 0470868856 (cloth)

An introduction to theoretical and applied colloid chemistry, "the world of neglected dimensions,"
Ostwald, Carl Wilhelm Wolfgang ; Fischer, Martin
1st ed.. New York. John Wiley & Sons; [etc., etc.]. 1917. 2 p.l., ix-xv, 232 p. front. (port.) illus., diagrs. 24 cm..

An introduction to theoretical and computational aerodynamics
Moran, Jack.
New York. Wiley. 1984. xiii, 464 p. : ill. ; 25 cm..
ISBN 0471874914 :

An introduction to theoretical chemistry
Simons, Jack.
Cambridge, UK. Cambridge University Press. 2003. xiii, 461 p. : ill. ; 26 cm..
ISBN 0521823609

An introduction to theoretical geomorphology
Thorn, Colin E.
Boston. Unwin Hyman. 1988. xiv, 247 p. : ill. ; 24 cm..
ISBN 0045511179 (alk. paper)

An introduction to theoretical kinematics
McCarthy, J. M.
Cambridge, Mass. MIT Press. 1990. 130 p. : ill. ; 24 cm..
ISBN 0262132524

An introduction to theoretical physical chemistry
Golden, Sidney.
Reading, Mass. Addison-Wesley Pub. Co.. 1961. 307 p. 24 cm..

An introduction to the organic chemistry of high polymers
Marvel, Carl Shipp
New York. Wiley. 1959. 82 p. 24 cm..

An introduction to theories of personality
Ewen, Robert B.
5th ed.. Mahwah, N.J. L. Erlbaum. 1997. 598 p. ; 24 cm..
ISBN 0805827196 (alk. paper)

An introduction to theories of personality
Ewen, Robert B.
New York. Academic Press. 1980. xiv, 524 p. : ill. ; 25 cm..
ISBN 0122451503

An introduction to theories of personality
Hergenhahn, B. R. ; Olson, Matthew H.
5th ed.. Upper Saddle River. Prentice Hall. 1999. xxv, 614 p. : ill. ; 24 cm..

An introduction to theories of popular culture
Strinati, Dominic.
2nd ed.. London. Routledge. 2004. xvii, 286 p. ; 23 cm..
ISBN 0415234999 (hardback : alk. paper)

An introduction to theories of social change
Strasser, Hermann ; Randall, Susan C.
London. Routledge & K. Paul. 1981. xi, 340 p. ; 22 cm..
ISBN 0710007892 :

An introduction to theory and applications of quantum mechanics
Yariv, Amnon.
New York. Wiley. 1982. xiii, 300 p. : ill. ; 25 cm..
ISBN 0471060534

An introduction to the osteology of the Mammalia
Flower, William Henry ; Gadow, Hans
3d ed., rev. with the assistance of Hans Gadow.. London. Macmillan. 1885. xi, 382 p. ill..

An introduction to the past and present of the kingdom of Iraq
Iraq
Baltimore. Printed by the Lord Baltimore Press]. 1946. x, 118 p. incl. front., illus. (incl. ports.), geneal tab. col. pl., fold. map. 25 cm..

An introduction to the performance of Bach
Bach, Johann Sebastian ; Tureck, Rosalyn.
London. Oxford University Press. 1960. 3 v. 31 cm..
ISBN 0193738767 (v. 1)

An introduction to the phenomenological theory of ferroelectricity
Grindlay, J.
[1st ed.]. Oxford. Pergamon Press. 1970. xiii, 255 p. illus. 22 cm..
ISBN 0080063624

An introduction to the philosophy of animate nature
Koren, Henry J.
St. Louis. Herder. 1955. 341 p. 21 cm..

An introduction to the philosophy of Bernard Lonergan
Meynell, Hugo Anthony.
2nd ed.. London. Macmillan. 1991. x, 224 p. ; 22 cm..
ISBN 0333546806 (cased) :

An introduction to the philosophy of Charles S. Peirce
Feibleman, James Kern
Cambridge, Mass. M.I.T. Press. 1970. xxiv, 503 p. 21 cm..
ISBN 0262060353

An introduction to the philosophy of education
O'Connor, D. J. (Daniel John)
New York. Philosophical Library. 1957. 148 p. 19 cm..

An introduction to the philosophy of induction and probability
Cohen, L. Jonathan (Laurence Jonathan)
Oxford. Clarendon Press. 1989. x, 217 p. ; 23 cm..
ISBN 019875079X :

An introduction to the philosophy of knowledge
Trusted, Jennifer.
2nd ed.. London. MacMillan. 1997. xii, 271 p. ; 22 cm..
ISBN 0333691865 (pbk.)

An introduction to the philosophy of language
Harrison, Bernard
New York. St. Martin's Press. 1980. xii, 303 p. ; 23 cm..
ISBN 0312431090

An introduction to the philosophy of law
Pound, Roscoe
Rev. ed.. New Haven. Yale University Pr.. 1955. 201 p. 21 cm..

An introduction to the philosophy of mind
Cockburn, David
Houndmills, Basingstoke, Hampshire. Palgrave. 2001. xviii, 157 p. : ill. ; 23 cm..
ISBN 0333786378

An introduction to the philosophy of mind
Lowe, E. J. (E. Jonathan)
Cambridge. Cambridge University Press. 2000. xiii, 318 p. ; 22 cm..
ISBN 0521652855 (hardcover)

An introduction to the philosophy of physics
Lange, Marc
Oxford. Blackwell. 2002. xvii, 320 p. : ill. ; 24 cm..
ISBN 0631225005

An introduction to the philosophy of religion
Abraham, William J. (William James)
Englewood Cliffs, N.J. Prentice-Hall. 1985. xiii, 258 p. ; 23 cm..
ISBN 0134918878

An introduction to the philosophy of religion
Davies, Brian
New ed.. Oxford [England]. Oxford University Press. 1993. x, 260 p. ; 22 cm..
ISBN 0192192531 (hard) :

An introduction to the philosophy of science
Benjamin, Abram Cornelius
New York. The Macmillan Company. 1937. xvi, 469 p. 22 cm..

An introduction to the philosophy of science
Carnap, Rudolf
[Paperback ed.]. New York. Basic Books. 1974. xii, 300 p. illus. 22 cm..
ISBN 0465095178

An introduction to the philosophy of science
Pap, Arthur
New York]. Free Press of Glencoe. 1962. 444 p. 24 cm..

An introduction to the philosophy of science
Theobald, D. W. (David William)
London. Methuen. 1968. xiii, 145 p. 22 cm..

An introduction to the philosophy of time and space
Van Fraassen, Bas C.
New York. Random House. 1970. xiv, 224 p. illus. 22 cm..

An introduction to the phonetics of American English
Thomas, Charles Kenneth.
2d ed.. New York. Ronald Press Co.. 1958. 273 p. illus. 21 cm..

An introduction to the physical chemistry of biological organization
Peacocke, A. R. (Arthur Robert)
Oxford [Oxfordshire]. Clarendon Press. 1983. xi, 302 p. : ill. ; 25 cm..
ISBN 0198553595 :

An introduction to the physical chemistry of iron & steel making
Ward, R. G. (Robert George)
London. E. Arnold. 1962. 238p. illus. 24cm..

An introduction to the physical properties of large molecules in solution
Richards, E. G. (Edward Graham) ; Dover, S. D. (Stanley David).
Cambridge [Eng.]. Cambridge University Press. 1980. xvii, 266 p. : ill. ; 24 cm..
ISBN 0521231108

An introduction to the physics and chemistry of colloids
Hatschek, Emil
3d ed.,. London. J. & A. Churchill. 1919. 116 p. illus. 19 cm..

An introduction to the physics and chemistry of petroleum
Kinghorn, Robert Richard Francis.
Chichester. Wiley. 1983. xv, 420 p. : ill. (some col.) ; 24 cm..
ISBN 0471900540 :

An introduction to the physics of diagnostic radiology
Christensen, Edward E. ; Curry, Thomas S. ; Dowdey, James E.
2d ed.. Philadelphia. Lea & Febiger. 1978. xiii, 428 p. : ill. ; 27 cm..
ISBN 0812106369

An introduction to the physics of ferroelectrics
Mitsui, Toshio. ; Tatsuzaki, Itaru. ; Nakamura, Eiji.
New York. Gordon and Breach Science Publishers. 1976. xiii, 443 p. : ill. ; 24 cm..
ISBN 0677306008 :

An introduction to the physics of intense charged particle beams
Miller, R. B.
New York. Plenum. 1982. x, 351 p. : ill. ; 24 cm..
ISBN 0306409313

An introduction to the physics of mass, length, and time
Feather, N. (Norman)
Edinburgh. University Press. 1959. ix, 358 p. diagrs. 22 cm..

An introduction to the physics of metals and alloys
Boas, Walter
N.Y. Wiley. 1947. xii, 193 p. illus. 25 cm..

An introduction to the physics of metals and alloys
Boas, Walter
New York. J. Wiley. 1949. xii, 193 p. illus. 25 cm..

An introduction to the physics of nonneutral plasmas
Davidson, Ronald C.
Redwood City, Calif. Addison-Wesley. 1990. xvi, 735 p. : ill. ; 25 cm..
ISBN 0201522233

An introduction to the physics of nuclei and particles
Dunlap, R. A.
Belmont, CA. Thomson Brooks/Cole. 2004. xii, 284 p. : ill. ; 24 cm..
ISBN 0534392946

An introduction to the physics of particle accelerators
Conte, Mario. ; MacKay, William W.
Singapore. World Scientific. 1991. xii, 250 p. : ill. ; 23 cm..
ISBN 981020812X

An introduction to the physics of vibrations and waves
Feather, N. (Norman)
Edinburgh. University Press. 1962. 330 p. illus. 23 cm..

An introduction to the physiology of hearing
Pickles, James O.
2nd ed.. London. Academic. 1988. 367 p. : ill. ; 24 cm..
ISBN 0125547536 (cased) :

An introduction to the physiology of hearing
Pickles, James O.
London. Academic Press. 1982. ix, 341 p. : ill. ; 23 cm..
ISBN 0125547501

An introduction to the PL/CV2 programming logic
Constable, R. L. (Robert L.) ; Johnson, Scott D. ; Eichenlaub, C. D.
Berlin. Springer-Verlag. 1982. x, 292 p. : ill. ; 25 cm..
ISBN 3540114920

An introduction to the poetry of Yvor Winters
Isaacs, Elizabeth
Chicago. Swallow Press. 1981. 216 p. ; 24 cm..
ISBN 080400353X

An introduction to the policy process
Birkland, Thomas A.
Armonk, N.Y. M.E. Sharpe. 2001. xiii, 294 p. : ill. ; 24 cm..
ISBN 0765604175 (cloth : alk. paper)

An introduction to the politics and philosophy of José Ortega y Gasset
Dobson, Andrew.
Cambridge [Cambridgeshire]. Cambridge University Press. 1989. xiii, 186 p. : port. ; 24 cm..
ISBN 0521360684

An introduction to the politics of tropical Africa
Hodder-Williams, Richard.
London. G. Allen & Unwin. 1984. xxv, 262 p. ; 23 cm..
ISBN 0043201628 (alk. paper)

An Introduction to the practical aspects of clinical hyperthermia
Field, Stanley B. ; Hand, Jeffrey W.
London. Taylor & Francis. 1990. xix, 572 p. : ill. ; 24 cm..
ISBN 0850667887

An introduction to the practical study of crystals, minerals and rocks
Cox, K. G. (Keith Gordon) ; Price, Norman Brian. ; Harte, Ben.
London. McGraw-Hill. 1967. vii, 233 p. plate (fold.), illus. (incl. 1 col.) 23 cm..

An introduction to the practice of commercial organic analysis
Allen, Alfred Henry
Philadelphia. Lindsay & Blakiston. 1879. v. : ill. ; 23 cm..

An introduction to the practice of organic chemistry in the laboratory
Adkins, Homer ; McElvain, Samuel M. (Samuel Marion) ; Klein, Michael William.
2d ed.. New York. McGraw-Hill. 1933. ix, 224 p. illus..

An introduction to the preparation and identification of organic compounds
Coghill, Robert D. (Robert De Wolf) ; Sturtevant, Julian Munson
1st ed.. New York. McGraw-Hill book Co.. 1936. xiii, 226 p. illus., diagrs. 21 cm..

An introduction to the principles of agricultural economics
Tuck, R. H.
London. Longmans. 1961. vii, 260 p. ; 23 cm..

An introduction to the principles of communication theory
Hancock, John C.
New York. McGraw-Hill. 1961. x, 253 p. illus. 24 cm..

An introduction to the principles of industrial administration
Fleming, A. P. M. (Arthur Percy Morris) ; Brocklehurst, H. J. (Harold John)
London. Sir I. Pitman & Sons, Ltd.. 1922. vii, 140 p. front., illus., diagrs. 22 cm..

An introduction to the principles of mechanics
Ross, J. F. S. (James Frederick Stanley)
New York. Harcourt, Brace & Co.. 1923. 400 p..

An introduction to the principles of medical imaging
Guy, Chris. ; Ffytche, Dominic.
London. Imperial College Press. 2000. xxxi, 367 p. : ill. ; 23 cm..
ISBN 1860941389 (alk. paper)

An introduction to the principles of morals and legislation
Bentham, Jeremy ; Burns, J. H. (James Henderson) ; Hart, H. L. A. (Herbert Lionel Adolphus)
London. Athlone P.. 1970. xliii, 343 p. 24 cm..
ISBN 485132117

An introduction to the principles of morals and legislation
Bentham, Jeremy
Oxford. Clarendon press; [etc., etc.]. 1907. 378 p. 20 cm..

An introduction to the principles of physical chemistry from the standpoint of modern atomistics and thermo-dynamics
Washburn, Edward W. (Edward Wight)
1st ed.. London [etc.]. McGraw-Hill book company, inc.. 1915. xxv, 445, [2] p. illus. (incl. tables) diagrs. 21 cm..

An introduction to the principles of physical chemistry from the standpoint of modern atomistics and thermodynamics
Washburn, Edward W. (Edward Wight)
2d ed., rev., enl. and reset.. New York [etc.]. McGraw-Hill Book Company, inc.. 1921. xxviii, 516 p. 1 l. illus. (incl. tables) diagrs. (1 fold.) 21 cm..

An introduction to the principles of plant physiology
Stiles, Walter
[2d ed. rev.]. London. Methuen. 1950. x, 701 p. illus. 26 cm..

An introduction to the principles of surface chemistry
Aveyard, R. ; Haydon, D. A.
Cambridge [Eng.]. University Press. 1973. xvi, 232 p. 22 cm..
ISBN 0521201101

An introduction to the principles of transformational syntax
Akmajian, Adrian. ; Heny, Frank.
Cambridge, Mass. MIT Press. 1975. xii, 418 p. ; 23 cm..
ISBN 0262010437

An introduction to the problem of government
Willoughby, Westel Woodbury ; Rogers, Lindsay
Garden City, N.Y. Doubleday, Page & company. 1921. x p., 1 ℓ., 545, [1] p. 24 cm..

An introduction to the problem of the oscillating airfoil as a vortex sheet
Fraser, William M.
1944. 18, [4] leaves : ill. ; 30 cm..

An introduction to the pronunciation of English
Gimson, A. C.
3d ed.. London]. Edward Arnold. 1980. xvi, 352 p. : ill. 23 cm..
ISBN 0713162880 (pbk.)

An introduction to the pronunciation of English
Gimson, A. C.
London. E. Arnold. 1962. 294 p. illus. 23 cm..

An introduction to the properties of engineering materials
Pascoe, K. J.
3d ed.. London. Van Nostrand Reinhold. 1978. xv, 439 p. : ill. ; 24 cm..
ISBN 0442302320

An introduction to the psychology of dreaming
Bulkeley, Kelly
Westport, Conn. Praeger. 1997. 129 p. : ill. ; 25 cm..
ISBN 0275958892 (hardcover : alk. paper)

An introduction to the psychology of hearing
Moore, Brian C. J.
2nd ed.. London. Academic Press. 1982. 293 p. : ill. ; 23 cm..
ISBN 0125056222 (pbk.)

An introduction to the psychology of hearing
Moore, Brian C. J.
3rd ed.. London. Academic Press. 1989. xvi, 350 p. : ill. ; 24 cm..
ISBN 0125056230 (hard : alk. paper)

An introduction to the psychology of hearing
Moore, Brian C. J.
4th ed.. San Diego, Calif. Academic Press. 1997. xvii, 373 p. : ill. ; 23 cm..
ISBN 0125056273 (alk. paper)

An introduction to the psychology of language
Herriot, Peter.
London. Methuen. 1970. 197 p. illus. 23 cm..
ISBN 0416116809

An introduction to the psychology of religion
Thouless, Robert Henry
2nd ed.. Cambridge [Eng.]. University Press. 1924. vii, 286 p. 20 cm..

An introduction to the psychology of religion
Thouless, Robert Henry
New York. The Macmillan company. 1923. 5 p. l., 286 p. 21 cm..

An introduction to therapeutic counseling
Porter, Elias H. (Elias Hull)
Boston. Houghton Mifflin. 1950. xi, 223 p. 23 cm..

An introduction to the Recent crustal movements of New Zealand
International Symposium on Recent Crustal Movements of the Pacific Region (1984 International Symposium on Recent Crustal Movements of the Pacific Region:
Wellington, N.Z. Royal Society of New Zealand. 1984. iv, 108 p. : ill. ; 30 cm..
ISBN 0908654057 (pbk.)

An introduction to the regenerative method for simulation analysis
Crane, Michael Allen. ; Lemoine, A. J.
Berlin. Springer-Verlag. 1977. vii, 111 p. ; 25 cm..
ISBN 0387084088

An introduction to the regulation of the petroleum industry
Taverne, Bernard
Norwell, Ma. Graham & Trotman. 1994. x, 246 p. ; 24 cm..
ISBN 1859660819

An introduction to thermal-fluid engineering
Warhaft, Z. (Zellman)
Cambridge. Cambridge University Press. 1997. xv, 241 p. : ill. ; 26 cm..
ISBN 0521581001 (hardback)

An introduction to thermal physics
Schroeder, Daniel V.
San Francisco, Calif. Addison Wesley. 1999. x, 422 p. : ill. ; 24 cm..
ISBN 0201380277

An introduction to thermodynamics
Sears, Francis Weston
2d ed.. Cambridge, Mass. Addison-Wesley Pub. Co.. 1953. 373 p. illus..

An introduction to thermodynamics for chemists
Martin, David Johnston.
New York. Longmans, Green & Co.. 1933. vii, 343 p. illus., diagrs. 23 cm..

An introduction to thermodynamics, for engineering students
Mills, John
Boston. Ginn and company. 1910. viii, 136 p. tables, diagrs, 24 cm..

An introduction to thermodynamics, the kinetic theory of gases, and statistical mechanics
Sears, Francis Weston
Prelim. ed.. Cambridge. Addison-Wesley. 1949. 197, 16 p. illus. 29 cm..

An introduction to thermodynamics with some new derivations based on real irreversible processes
Silver, R. S. (Robert Simpson)
Cambridge [Eng.]. University Press. 1971. xx, 150 p. illus. 24 cm..
ISBN 0521080649

An introduction to thermogravimetry
Keattch, Cyril Jack.
London. Heyden, in co-operation with Sadtler Research Laboratories, Philadelphia. 1969. [8], 59 p. illus. 26 cm..
ISBN 085501007X

An introduction to thermomechanics
Ziegler, Hans
2d rev. ed.. Amsterdam. North-Holland Pub. Co.. 1983. xiii, 355 p. : ill. ; 24 cm..
ISBN 0444865039 (Elsevier)

An introduction to thermomechanics
Ziegler, Hans
Amsterdam. North-Holland Pub. Co.. 1976. xi, 308 p. : ill. ; 24 cm..
ISBN 0444110801 (American Elsevier)

An introduction to thermonuclear research
Simon, Albert
London. Pergamon Press. 1959. 182 p. illus. 23 cm..

An introduction to the rock-forming minerals
Deer, W. A. (William Alexander) ; Howie, R. A. (Robert Andrew) ; Zussman, J.
2nd ed.. Harlow, Essex, England. Longman Scientific & Technical. 1992. xvi, 696 p. : ill. ; 24 cm..
ISBN 0470218096

An introduction to the rock-forming minerals
Deer, W. A. (William Alexander) ; Howie, R. A. (Robert Andrew) ; Zussman, Joseph.
New York. Wiley. 1966. x, 528 p. illus. 23 cm..

An introduction to the science and practice of qualitative chemical analysis
Jones, Chapman.
London. Macmillan & Co.. 1898. viii, 213 p. : 7 tables paged in..

An introduction to the science of artificial lighting
Ackerley, R. O.
London. E. & F.N. Spon. 1948. 135 p. illus. 23 cm..

An introduction to the science of metals
Richman, Marc H.
Waltham, Mass. Ginn and Co.. 1967. xvi, 400 p. illus. 26 cm..

An introduction to the science of peace (irenology)
Starke, J. G. (Joseph Gabriel)
Leyden. A. W. Sijthoff. 1968. 216 p. 21 cm..

An introduction to the science of photography
Chamberlain, Katherine McFarlane
New York. Macmillan. 1951. xiii, 292 p. illus. (part col.) 25 cm..

An introduction to the science of radio-activity
Raffety, Charles W.
London. Longmans, Green. 1909. xii, 208 p. : ill. ; 20 cm..