TY  - BOOK
AU  - Verma P S
AU  - Agarwal V K
TI  - Environmental biology : principles of ecology
SN  - 81 219 0859 0
U1  - 574.5 VERE 
PY  - 2006///
CY  - New Delhi
PB  - S. Chand & Co. Ltd
KW  - Ecosystem Diversity Biogeography Wild Life
ER  -