Short description: In Russian. Protodyakonov, Mikhail Mikhailovich. Materials for mining lesson position. Moscow: Central Committee of Mineworkers, 1926. Materialy dlya urochnogo polozheniya gornykh rabot. In Russian /Materials for mining lesson position. 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. SKU8976491