Tripathi, A K. Advances in environmental sciences / edited by A.K. Tripathi, S.N. Pandey and A.K. Srivastava. - New Delhi : Ashish Publishing House , 1993. - xxi,387p. : tables ; 23cm. . NULL ISBN: 8170245281 Rs. 500.00 Subjects--Index Terms: ENVIRONMENTAL SCIENCE Dewey Class. No.: 628 / TRI/A