Dewey, Melvil Dewey decimal classification and relative index / Melvil Dewey - 20th ed. - New York : Forest Press, c1989. - vol.1;vii, 961 p. ; 24 cm. ISBN: 0910608415 LCCN: Subjects--Topical Terms: ClassificationDewey decimal LC Class. No.: Z696 / .D519 1989