COMMUNITY PROGRAMS IN RESPIRATORY DISEASE CONTROL.
D000397:Air Pollution; D001945:Breathing Exercises; D006801:Humans; D008400:Mass Chest X-Ray; D012111:Residence Characteristics; D012120:Respiration Disorders; D012140:Respiratory Tract Diseases; D014116:Toxicology
AIR POLLUTION; BREATHING EXERCISES; MASS CHEST X-RAY; RESPIRATORY TRACT DISEASES; TOXICOLOGIC REPORT