TY  - GEN
AU  - Asthana, D K & Asthana, Meera
TI  - Textbook of environmental studies for undergraduate courses 
SN  - 9788121927642
U1  - 910.13337 
PY  - 2023///
PB  - S Chand And Company Limited
KW  - Environment
KW  - Geography
KW  - Environmental geography
ER  -