00789nam a2200253Ia 4500 67619 BIBL 20160527192837.0 690707s1969 dcua b 00100 eng 75601265 //r89 (OCoLC)00017812 PUCPR cicg TD 881 .U56 628/.53/2 United States National Air Pollution Control Administration. 182913 Local Air quality criteria for particulate matter. Washington 1969. 1 v. (various pagings) illus. 26 cm. Its Publication Includes bibliographies. Air quality Standards. 50163 Local National Air Pollution Control Administration publication no. AP-49. 52567 52567 0 0 lc 0 TD_881_000000000000000__U56 0 cil 188786 7 7 4 2016-05-27 97583 0 TD 881 .U56 70000000899163 2016-05-27 00:00:00 r:67619 z:NCC:L 6