004100000a22001330004500003000900000005001700009110008100026245005700107050001200164264004100176300000900217041000800226650004200234PH-MaWHO20241108112057.0  aAmerican Public Health Association. Program Area Committee on Air Pollution.  aGuide to the appraisal and control of air pollution.  a2nd ed.  aNew York : bThe Association,c1969.  a80p.  aeng  aAir pollutionxPrevention and control