TY  - BOOK
AU  - Asthana,D K
TI  - Environment : problems and solutions 
SN  - 8121916542
U1  - 363.7 
PY  - 1998/// [1999]
CY  - 	New Delhi :  
PB  - S Chand
KW  - Environment.
KW  - India
ER  -