000			00313nam a22001337a 4500
003			OSt
020			_a978-81-934226-0-1
082			_a333 _bSHA-R1
245			_aEnvironment
250			_aEd 9
260			_aChennai _bShankar IAS Academy Book Publications _c2021
300			_a448 _bPaper Binding
942			_2ddc _cBK _01
999			_c17189 _d17189