000 00249nam a22001217a 4500
999 _c33831
_d33831
020 _a8171337287
100 _aRANA,S.V.S.
245 _aEnviromental Studies
250 _a1st
260 _aNew Delhi
_bRastogi
_c2004
300 _aB.P.
942 _cREF