TY  - BOOK
AU  - Asthana, D. K.,
TI  - Environment Problems and Solutions
SN  - 8121916542
U1  - 551 
PY  - 1998///
CY  - New Delhi
PB  - S. Chand And Co. Ltd.
KW  - Environment
KW  - Geology, hydrology & meteorology
ER  -