TY  - BOOK
AU  - Purkayastha, Gautam
TI  - Environmental studies
SN  - 9789388778398
U1  - 628 PUR 
PY  - 2019///
CY  - New Delhi
PB  - Kalyani Publishers
KW  - Environmental sciences
KW  - Human ecology
KW  - Environmental protection
ER  -