TY  - BOOK
AU  - Asthana D.K and Asthana, Meera
TI  - Environment : problems and solutions / 
SN  - 8121916542
U1  - 333.7 AST A 
PY  - 1998///.
CY  - New Delhi
PB  - S.Chand & Company Ltd.
KW  - Environment
ER  -