Efficiency and rational application of various methods and techniques of water drainage in opencast mining : questionnaire / transmitted by the Government of the Union of Soviet Socialist Republics.
1984
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详细记录
符号[E/ECE/]COAL/GE.5/R.30/Add.1
标题Efficiency and rational application of various methods and techniques of water drainage in opencast mining : questionnaire / transmitted by the Government of the Union of Soviet Socialist Republics.
作者USSR
日期Geneva : UN, 24 Jan. 1984.
描述
2 p.