✦ LIBER ✦
The increase of roof flaking in longwall faces as a result of working under pillar edges and of abutment pressure of adjacent workings
✍ Scribed by O. Jacobi
- Publisher
- Elsevier Science
- Year
- 1966
- Tongue
- English
- Weight
- 545 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0148-9062
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