METHOD OF OPEN-CAST MINING OF STEEP MINERAL DEPOSITS von DRIZHENKO ANATOLIJ YU,SU, KAMYANYJ IVAN V,SU, SHEBEKO VIKTOR S,SU, MIZYUK VALENTIN D,SU, BAZARNYJ VALENTIN D,SU, KUTS VASILIJ S,SU, TARANENKO ANDREJ M,SU

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