Purohit, S.S. Shammi, Q.J. Agrawal, A.K. A textbook of environmental sciences: / S.S. Purohit, Q.J. Shammi and A.K. Agrawal - Jodhpur: Student Edition pub., 2004. - 397 p. Includes glossary. ISBN: 8188826146 Subjects--Topical Terms: Environmental science Dewey Class. No.: 333.7 / PUR