TY  - BOOK
AU  - DR. GUPTA K M.
TI  - ENERGY, ENVIRONMENT AND ECOLOGY: 3RD ED
AV  - 671.012GUP 196
U1  - 671.105GUP 3RD.ED.
PY  - 2012///
CY  - DELHI
PB  - UMESH
ER  -