TY  - BOOK
AU  - Tyagi, Anil.
TI  - UGC NET/SLET: Environmental science 
SN  - 9788189301446
U1  - 574.5076 
PY  - 2020///
CY  - New Delhi
PB  - DANIKPUBLISHING COMPANY
KW  - ENVIRONMENTAL SCIENCE
ER  -