Preparation of an industrial classification of medium-rank coals / transmitted by the Government of Spain.
1982
详细记录
符号[E/ECE/]COAL/GE.3/R.58/Add.6
标题Preparation of an industrial classification of medium-rank coals / transmitted by the Government of Spain.
作者Spain
日期Geneva : UN, 7 Dec. 1982.
描述
3 p.