✦ LIBER ✦
Influence of coal layer left in the roof on the maintenance of caved longwall workings (in Polish) : Bilinski, A; Sikora, W Przegl Gorn, V34, N6, June 1978, P241–244
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 113 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0148-9062
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