Subrahmanyam, N S and Sambamurty, A V S S Ecology - 2nd - New Delhi Narosa Publishing House 2008 - 32.16 + 7 + 30 + A-1.40 + A-2.14 + A-3.4 + I.24 ISBN: 9788173197406 Publisher. No.: Vidyarthi Books Subjects--Personal Names: Environmental Science Subjects--Topical Terms: Environmental Science