000 00351nam a2200109Ia 4500
008 180413s9999 xx 000 0 und d
245 0 _aAir Quality Criteria For Particulate Matter
260 _bWashington Dc : Us Dept Of Health 1969.
300 _a211
546 _aEng
690 _aAir ; Matter ; Atmosphere ; Chemicophysical Properties ; Qd Chemistry.
999 _c15974
_d15974