About BLAGOV I S
About Ministry of the Coal Industry of the USSR
About DEBERDEEV I Kh
About Ministry of the Coal Industry of the USSR
About Proceedings. 1983 International Conference on Coal Science
About flotation
About fusinite
About Flotation
About Properties,composition,analysis and test of coal and coke
About 石炭
About 浮選
About 物性
About 研究