TY  - BOOK
AU  - Verma,P S.
AU  - Agarwal,V K.,1
TI  - Environmental Biology
SN  - 9788121908597
U1  - 577 
PY  - 2018///
CY  - New Delhi
PB  - S Chand
KW  - Ecology
KW  - Environmental biology
ER  -