In Russian. Trupak, Nikolai Grigorievich. Special methods of mining. Moscow: Subsoil, 1976. Spetsial'nye sposoby provedeniya gornykh vyrabotok. In Russian /Special mining techniques . All images are for identification of editions only. Several books of the same edition may be available. Please feel free to request photos of available books. SKU8419548
In Russian. Trupak, Nikolai Grigorievich. Soil Freezing in Underground Construction. Moscow: Subsoil, 1974. Zamorazhivanie gruntov v podzemnom stroitel'stve. In Russian /Soil freezing in underground construction. All images are for identification of editions only. Several books of the same edition may be available. Please feel free to request photos of available books. SKU8419539
In Russian. Trupak, Nikolai Grigorievich. Soil Freezing in Construction. Moscow: Stroyizdat, 1970. All images are for identification of editions only. Several books of the same edition may be available. Please feel free to request photos of available books. SKU8419541