TY  - BOOK
AU  - Gupta; Anil,Gupta;Sanjeev
TI  - Environment Studies
SN  - 81-8008-255-2
U1  - 574.52 S23E 
PY  - 1992///
CY  - NewDelhi
PB  - Laxmi Publication
KW  - E.V.S
ER  -