Report : Economic Commission for Europe, Committee on Energy, Working Party on Coal, 10th Ad Hoc Meeting on the Elaboration of an International Classification of Coals in Seam, Geneva, 16-18 September 1992.
1992
详细记录
符号[E/ECE/]ENERGY/WP.1/AC.1/4
标题Report : Economic Commission for Europe, Committee on Energy, Working Party on Coal, 10th Ad Hoc Meeting on the Elaboration of an International Classification of Coals in Seam, Geneva, 16-18 September 1992.
日期Geneva : UN, 2 Oct. 1992.
描述
6 p. : ill.