EFFECTS OF DIESEL EXHAUST.
D000397:Air Pollution; D006801:Humans; D009787:Occupational Medicine; D010414:Pennsylvania; D011890:Railroads; D012129:Respiratory Function Tests; D012137:Respiratory System; D013223:Statistics as Topic; D001335:Vehicle Emissions
D001335:Vehicle Emissions
AIR POLLUTION; INDUSTRIAL MEDICINE; PENNSYLVANIA; RAILROADS; RESPIRATORY FUNCTION TESTS; RESPIRATORY SYSTEM; STATISTICS