Dayal,R. creator text New Delhi M D Publications 1997 monographic xi,316p. 22cm(Hb) by R.Dayal Includes bibliographical reference and index Liquid Nitrogen Preservation तरल नाइट्रोजन संरक्षण 307.772 DAY 8175330384 A-896387 Cen Lib/Ret DPL 20170124105919.0 EN