TY  - BOOK
AU  - CHATWAL, GURDEEP R.
AU  - SHARMA, HARISH
TI  - TEXT BOOK OF ENVIRONMENTAL STUDIES: ENVIRONMENTAL SCIENCES 
SN  - 8183180604
U1  - 720.47 
PY  - 2004///
CY  - MUMBAI
PB  - HIMALAYA
ER  -