00488nam a22001097a 4500 231110s1980 ru ||||| |||| 00| 0 eng d Pokrovsky, N. M. 282540 Underground structure and mines : Construction practices ; Driving horizontal workings and tunnels / N. M. Pokrovskiĭ. Moscow : Mir Publishers, ©1980. სამთო საქმე სასარგებლო წიაღისეულის ძიება 0 4 udc 0 0 633603 CPL CPL GEN 2023-11-10 0 2023-565001953436062 2023-11-10 07:54:20 2E30662 2023-11-10 BK 716957 716955