TY  - BOOK
AU  - Mirsa, S P
AU  - Pandey,S N
TI  - Essential environmental studies
SN  - 9788180521720
U1  - 574.52/MIR 
PY  - 2009///
CY  - New Delhi
PB  - Ane Books
KW  - Environmental sciences
KW  - Human ecology
ER  -