000 00288nam a2200121Ia 4500
008 160710s1974 xx 000 0 und d
082 _a614.7 PER
100 _aPERKINS, HENRY C.
245 _aAIR POLLUTION
260 _bMCGRAW-HILL BOOK COMPANY
_c1974
300 _a407
942 _2ddc
_cB
999 _c36173
_d36173