Comaromi, John P. Dewey Decimal Classification and Relative Index(E-Book) / John P. Comaromi, Julianne Beall, Winton E. Matthews and Gregory R. New - 20th ed - New York :FOREST PRESS, 1989. - 888p. V-III ISBN: 0-910608-37-7 Subjects--Topical Terms: Classification, Dewey decimal Dewey Class. No.: 025.431