Trivedi, R. N. A text book of environmental sciences / R. N. Trivedi. - 1st ed. - New Delhi : Anmol Publications, 1997 - xi, 472 p. : ill. ; 22 cm. ISBN: 8174885447 Subjects--Topical Terms: Environmental Sciences LC Class. No.: GE105 / .M39 1998 Dewey Class. No.: 363.7 / TRT