TY  - BOOK
AU  -  Asthana, D. K.
AU  - Asthana,Meera
TI  - Environment: problems & solutions 
SN  - 8121916542
U1  - 363.7 23
PY  - 2001///
CY  - New Delhi
PB  - S. Chand Co.
KW  - Environmental Science
ER  -