McGraw-Hill encyclopedia of science & technology : an international reference work, Vol.15 - 7th ed. - New York : McGraw-Hill, 1992 - 620p. : ill. ; 29cm. Includes bibliographical references ISBN: 0-07-909206-3 Subjects--Topical Terms: Science, Technology, Encyclopedias LC Class. No.: REF Q121.M3 1992 Vol.15