TY  - BOOK
AU  - ASTHANA, D K
AU  - ASTHANA, MEERA
TI  - Environmental: Problems and Solutions
SN  - 8121916542
U1  - 628  
PY  - 1998///
PY  - 2009///
CY  - New Delhi
PB  - S. Chand & Company LTD.
KW  - Environment
KW  - Impact of biosphere - Environment
ER  -