Short description: In Russian. Lvov, Vladimir Nikolaevich. Hard coal, how it is extracted and how it was formed. Moscow: State Publishing House, 1922. Kamennyy ugol', kak ego dobyvayut, i kak on obrazovalsya. In Russian /Hard coal, how it is mined and how it was formed. 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. SKU9140595