TY  - BOOK
AU  - Agrahari, Ravi P. 
TI  - Environmental, ecology, bio-diversity, climate change & disaster management: for UPSC, IES, IFoS & all state services examination 
SN  - 9789390185337
PY  - 2021///
CY  - Chennai
PB  - Mc Graw Hill
ER  -