TY  - BOOK
AU  - ASTHANA (D K);ASTHANA (Meera)
TI  - Environment: problems and solutions
SN  - 81-219-1654-2
U1  - 363.7 ASTE 
PY  - 2009///
CY  - New Delhi
PB  - S Chand & Company Ltd
KW  - Environmental Problems
ER  -