Preparation of an industrial classification of medium-zone coals / transmitted by the ICCP.
1982
详细记录
符号[E/ECE/]COAL/GE.3/R.58/Add.1
标题Preparation of an industrial classification of medium-zone coals / transmitted by the ICCP.
日期Geneva : UN, 5 July 1982.
描述
1 p.