Preparation of an industrial classification of medium-rank coals / transmitted by the Government of the Union of Soviet Socialist Republics.
1982
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详细记录
符号[E/ECE/]COAL/GE.3/R.49/Add.15
标题Preparation of an industrial classification of medium-rank coals / transmitted by the Government of the Union of Soviet Socialist Republics.
分发
DER
作者USSR
日期Geneva : UN, 26 Apr. 1982.
描述
5 p. : tables