详细记录
符号[E/ECE/]COAL/GE.4/R.19/Add.9
标题Report / transmitted by the Government of Czechoslovakia.
其它标题
Drivage, development and support of roadways and faces in deep mines - 1,000 metres and over - and consequently in more difficult mining, geological and atmospheric conditions : report
日期Geneva : UN, 21 Nov. 1983.
描述
7 p. : table