Air quality in selected urban areas 1979-1980. WHO Collaborating Centre on Environmental Pollution Control, United States Environmental Protection Agency, Washington, DC.
D000336:Aerosols / Q000032:analysis; D000349:Africa; D000393:Air Pollutants / Q000032:analysis*; D000569:Americas; D001208:Asia; D001315:Australia; D005060:Europe; D006801:Humans; D007391:International Cooperation; D008877:Middle East; D009520:New Zealand; D012906:Smoke / Q000032:analysis; D013458:Sulfur Dioxide / Q000032:analysis; D014504:Urban Health
D000336:Aerosols; D000393:Air Pollutants; D012906:Smoke; D013458:Sulfur Dioxide