Sharma, P.D. . Environmental Biology / Textual Documents P.D. Sharma. - 2nd ed / - Meerut : Rastogi Piblications , 2001. - x, 416p. : ill ; 22cm. . Index ISBN: 81-7133-552-7 Rs. 110.00 Subjects--Index Terms: Biology Botany Environment Dewey Class. No.: 575 / Sh 11 En