[Letter: Several trends in the area of hygienic standardization of carcinogenic substances in the environment].
D002273:Carcinogens / Q000592:standards*; D004787:Environmental Pollution / Q000517:prevention & control*; D008452:Maximum Allowable Concentration; D014586:USSR
D002273:Carcinogens
O nekotorykh tendentsiiakh v oblasti gigienicheskogo normirovaniia kantserogennykh veshchestv v okruzhaiushcheĭ srede