Open work on the metal mines of the Urals

Open work on the metal mines of the Urals: a collection on the design of open developments in the Urals and the practice of excavation and drilling in open work in the United States / Horn.Ing.: N.I.Semkin, S.G.Kosinsky, L.L.Onishchenko and others;Under the general.Ed.Horn.Ing.: N.I.Semkina and N.V.Melnikova.- Sverdlovsk: Ural.Publishing House, 1934. -154, [3] p.: table., Il .. -On the region.Chiller: Open work on metal mines.On the region.Publishing House: Ural.state.Publishing House.Bibliogr.In the tuning.Note..I. Melnikov, N.V .. II.Buchnev, V.K .. III.Onishchenko, L.L .. IV.Semkin, N.I. .. V. Kosinsky, S.G..1.Territory (collection).Electronic copy source: PBOriginal storage location: Chelyabinsk OUNB