000 00286nam a2200121Ia 4500
008 160710s1974 xx 000 0 und d
082 _a628.53 PER
100 _aPERKINS,HERY C.
245 _aAIR POLUTION
260 _bMCGRAW HILL BOOK COMPANY
_c1974
300 _a407
942 _2ddc
_cB
999 _c39519
_d39519