TY  - BOOK
AU  - Bir, Ritu
TI  - Environmental studies
SN  - 9789380097350
U1  - 372.357 21st ed.
PY  - 2009///
CY  - New Delhi
PB  - Vayu Education of India
KW  - Environmental engineering
KW  - Environmental policy
KW  - Environmental sciences
N1  - Index: pp 176-80
ER  -