✦ LIBER ✦
Room and pillar retreat mining. A manual for the coal industry : Kaufman, P W; Hawkins, S A; Thompson, R R US Bureau of Mines report IC 8849, 1981, 228P
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 108 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0148-9062
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