TY  - BOOK
AU  - Agarwal, V. K. 
AU  - Verma, P. S.
TI  - Environmental Biology: principles of ecology
SN  - 8121908590
U1  - 577 
PY  - 1989///
CY  - New Delhi
PB  - Chand
KW  - Biology
KW  - Ecology
ER  -