Ranganathan, S.R. Documentation : genesis and development - rep. 2006 - New Delhi Ess Ess Publications 1973 - 310p. ; 21 cm - Sarada Ranganathan Endowment for Library Science series no. 3 . ISBN: 81-70000-476-4 Subjects--Topical Terms: Documentation; Library Science Dewey Class. No.: 029 / RAN