TY  - BOOK
AU  - Awasthi, Ashok Kumar
TI  - Environmentals studies: concepts and MCQs 
SN  - 9788197240379
U1  - 333 
PY  - 2025///
CY  - New Delhi
PB  - Ane Books
KW  - Biodiversity
KW  - Ecosystems
KW  - Pollution
ER  -