000 00429nam a22001697a 4500
005 20230809101511.0
008 230809b xxu||||| |||| 00| 0 eng d
020 _a9788193422601
041 _aeng
082 _a363.7076
_bENV
100 _aEnvironment.
_930109
245 _aEnvironment/
250 _a9th ed
260 _aChennai;
_bShankar IAS Academy Book Publications,
_c2021.
300 _a448p:. 24cm
_epbk
942 _cBK
999 _c42181
_d42181