[On the hygienic norm of ammonium content in the air].
D000397:Air Pollution; D000818:Animals; D002617:Chemical Industry; D004569:Electroencephalography; D004781:Environmental Exposure; D004782:Environmental Health; D005123:Eye / Q000187:drug effects; D008669:Metallurgy; D000644:Quaternary Ammonium Compounds / Q000633:toxicity*; D051381:Rats; D014586:USSR
D000644:Quaternary Ammonium Compounds
K gigienicheskomu normirovaniiu soderzhaniia ammiaka v atmosfernom vozdukhe.