000 00355nam a2200157Ia 4500
008 230915s9999 xx 000 0 und d
082 _a GUP
100 _aGupta, K.M
245 0 _aEnvironmental Studies
250 _aII
260 _aNEW DELHI
260 _bUMESH PUBLICATIONS
260 _c2006
300 _a364
650 _aEnvironmental Science
999 _c159065
_d159065