TY  - BOOK
AU  - Verma, P.S.
TI  - Environment Biology Principles Of Ecology (1st Ed.) 
SN  - 81-219-0859-0
U1  - 577 Ver 
PY  - 2012///
CY  - New Delhi
PB  -  S Chand And Company
KW  - Ecology, environment, environmental biology
N2  - Available
ER  -