Analysis of the development of concentration indices at faces in the Ostrava-Karviná coalfield for the period 1981-1982 : information / transmitted by the Government of Czechoslovakia.
1983
详细记录
符号[E/ECE/]COAL/GE.1/R.54/Add.2
标题Analysis of the development of concentration indices at faces in the Ostrava-Karviná coalfield for the period 1981-1982 : information / transmitted by the Government of Czechoslovakia.
日期Geneva : UN, 20 May 1983.
描述
3 p. : tables