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