Dewey, Melvil. DDC23 : Dewey Decimal Classification Vol.IV - 23 ed. - Delhi: OCLC (Laurence), c 2011. - 965 p. 24cm 1885 ISBN: 978191608814 1910608815 LCCN: 581 Subjects--Topical Terms: Dewey Decimal Classification Dewey Class. No.: 025.431 / DEW-D