Инструкция по колонковому бурению - утв. Ком. по делам геологии при СНК СССР 13.09.41

Инструкция по колонковому бурению - утв. Ком. по делам геологии при СНК СССР 13.09.41

132 Pages · 1942 · 1.05 MB · Russian
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“ Where there is ruin, there is hope for a treasure. ” ― Rumi
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