[Contemporary maximum permissible concentrations of poisonous gases, vapors and dusts in the air of industrial enterprises in the USA and USSR].
D000397:Air Pollution / Q000517:prevention & control*; D035843:Biomedical Research; D004391:Dust; D005740:Gases; D007221:Industry; D014586:USSR
D004391:Dust; D005740:Gases
AIR POLLUTION/prevention and control