Gopinath,M.A Subject Classification Practice : S.R. Ranganathan's Postulational approach, worked out examples using CC, DDC and UDC Schemes by M.A .Gopinath and Alar Mel Mangai M A - New Delhi Ess Ess Publications 2004 ISBN: 8190095765 Dewey Class. No.: 025.42 GOP/SUB