Preparation of a subclassification of medium-rank coals : consolidated report / transmitted by the Government of the Federal Republic of Germany.
1982
Полное описание
Условное обозначение[E/ECE/]COAL/GE.3/R.59
ЗаглавиеPreparation of a subclassification of medium-rank coals : consolidated report / transmitted by the Government of the Federal Republic of Germany.
ДатаGeneva : UN, 28 Dec. 1982.
Описание
16, [2] p. : charts, tables.