000 00263nam a2200121Ia 4500
008 220201s1999 xx 000 0 eng d
082 _a620.8
_bRAO
100 _aRao, M N
245 0 _aAir pollution
260 _aDelhi
_bTMH
_c1999
300 _a339
942 _2ddc
999 _c35824
_d35824