✦ LIBER ✦
Development of roof control techniques for massive roof problems in longwall operations : De Bakker, P; Harvey, A; Cleary, M US Bureau of Mines report OFR 115-80, Nov 1979, 191P
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 110 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0148-9062
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