TY  - BOOK
AU  - ASTHANA (D K) and ASTHANA (Meera).
TI  - Environment : problems & solutions. Ed 1
SN  - 81 219 1654 2
U1  - 363.7 ASTE 
PY  - 1998///
CY  - New Delhi.
PB  - S. Chand & Co. Ltd.
KW  - Environment: problems & solutions
ER  -