TY  - GEN
AU  - Verma, P. S.
AU  - Agarwal, V. K.
TI  - Environmental biology: principles of ecology
SN  - 8121908590
U1  - 570 
PY  - 1983///
CY  - New Delhi
PB  - S.Chand  & Company Ltd
KW  - Life sciences
ER  -