[Problems in rural public health in the works and activity of N. A. Semashko].
D049672:History, 19th Century; D049673:History, 20th Century; D011634:Public Health; D012424:Rural Population; D014937:Work
PUBLIC HEALTH
Voprosy sel'skogo zdravookhraneniia v trudakh i deiatel'nosti N. A. Semashko.