Coaling industry in Russia in 1915

The coal industry of Russia in 1915 / Stat.Bureau of the Council of Congress of Mining South -Industors of the South of Russia.- Kharkov: B. and., 1916. -Plug.paralle.on Russian.and fr.ulcer..I. Council of Congress of Mining South -Industors of the South of Russia (Kharkov).Statistical Bureau.Electronic copy source: PB