[Sanitary-hygienic working conditions at the K. Libknekht and M. V. Frunze Mines of the Ore Administration].
D004391:Dust; D006920:Hygiene; D008906:Mining; D012426:Russia; D012621:Seasons
D004391:Dust
Sanitarno-gigienicheskie usloviia truda na shakhtakh rudoupravleniia im. K. Libknekhta i im. M. V. Frunze.