TY  - BOOK
AU  - SHARMA, P . D .
TI  - ECOLOGY & ENVIRONMENT / 
SN  - 9788171339051
U1  - 574.52 
PY  - 1997///
CY  - MEERUT
PB  - RASTOGI
KW  - ECOLOGY
KW  - ENVIRONMENTAL BIOLOGY
N1  - 10TH ED. / 2009 / xi , 600 P ; 11TH REV ED / 2011-12 / 643 P; 12TH ED / 2015-16/ xxiv , 708 , 24 P/ 525/- ; 13TH ED/17-18/XIX,755P
ER  -