[K. Marx on health protection for the working class].
D003148:Communism / Q000266:history; D004739:England; D005197:Famous Persons; D049672:History, 19th Century; D049673:History, 20th Century; D009787:Occupational Medicine / Q000266:history*; D012425:Russia (Pre-1917)
K. Marks ob okhrane zdorov'ia rabochego klassa.