TY  - BOOK
AU  - Verma, P  S 
TI  - Environmental Biology: :Principles of Ecology 
SN  - 9788121908597
U1  - 574 VER 
PY  - 2008///
CY  - New Delhi
PB  - : S Chand & Company 
KW  - Biology
KW  - Ecology
KW  - Biologie
KW  - P S Verma & V K Agarwal
KW  - and Environmental Biology :Principles of Ecology
ER  -