TY  - GEN
AU  - Bhyrappa,P. V. 
TI  - Environment & Ecology for UPSC civil services & state services examination
SN  - 9789370602052
PY  - 2025///
CY  - New Delhi.
PB  - Wiley,India Pvt Ltd
KW  -  Environment and Ecology-UPSC Competetive examination Guide Book
ER  -