TY  - BOOK
AU  - Verma, P S  & Agarwal, V K
TI  - Environmental biology: Principles of ecology
SN  - 9788121908597
U1  - 577. VEP E 
PY  - 2021///
CY  - New Delhi
PB  - S Chand & Com
KW  - Bioscience
KW  - E1676
ER  -