共 50 条
- [1] First Experience Gained in the Use of Longwall Caving for Copper Shale Mining. Neue Bergbautechnik, 1979, 9 (11): : 601 - 611
- [8] Raw materials efficiency in mining. Instruments to increase efficiency in the extraction of raw materials Martens, Per Nicolai, 1600, Blackwell Publishing Ltd (150):