TY  - BOOK
AU  - Singh, Gurcharan / Sethi, Inderjeet Kaur / Shethi, M. S.
TI  - Topics & Temrs In Environmental Science (vol 2 )
SN  - 81-7169-177-3
U1  - 910.0923 
CY  - N. Delhi
PB  - Commonwealth Publishers
KW  - -
N1  - 3451
ER  -