TY  - BOOK
AU  - Verma,P.S., Agarwal, V.K.
AU  - x
TI  - Environmental biology: (Principles of ecology)
SN  - 8121908590
U1  - 574.5/V522e 
PY  - 2000///
CY  - New Delhi
PB  - S. Chand
KW  - Biology
KW  - Ecology
N1  - Includes
ER  -