TY  - BOOK
AU  - Singh,B B
TI  - UGC-NET Environmental science:paperII
T2  - G Gupta
SN  - 9789387604674
U1  - 577.07 
PY  - 2025///
CY  - NewDelhi
PB  - Ramesh publishing house
KW  - UGC-NET
KW  - Environmental science
ER  -