000 00263nam a2200121Ia 4500
008 220201s1974 xx 000 0 eng d
082 _a628.39
100 _aPerkins,HC
245 0 _aAir Pollution
260 _bMc Graw Hill
_c1974
300 _a407
942 _2ddc
999 _c80400
_d80400