Short description: In Russian. Trupak, Nikolai Grigorievich. Freezing of rocks during shafts. Moscow: Ugletekhizdat, 1954. Zamorazhivanie gornykh porod pri prokhodke stvolov. In Russian /Freezing of rocks during shafts. 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. SKU8419538