TY  - BOOK
AU  - Verma, P.S./ Agarwal, V.K.
TI  - Environmental biology : principles ecology
SN  - 8121908590
AV  - QH 308.2 V4 1983 
PY  - 1983///
CY  - New Delhi
PB  - S. Chand
KW  - Biology
KW  - Ecology
KW  - Enviroment
ER  -