Short description: In Russian. Lakoza, Nikolai Prokopyevich. Mechanization of hard coal mining. Leningrad Moscow: Gostoptekhizdat, 1940 (Leningrad). Mekhanizatsiya vyemki kamennogo uglya. In Russian /Mechanization of Hard Coal Mining . The image is provided for reference only. It may reflect condition of one of the available copies or only help in identifying the edition. Please feel free to contact us for a detailed description of the copies available. SKU5219523