Asthana, D.K.. Environment: Problems & Solutions / by D.K. Asthana and Meera Asthana. - New Delhi-110055 : Chand & Company Ltd. , 1997 - xii, 323p : ISBN: 81-219-1654-2 Subjects--Topical Terms: Life Science Dewey Class. No.: G:55 / N5;1