✦ LIBER ✦
Mining an area of residual coal at Walsum colliery (In German and English) : Backhauss, G; Geisler, J GluckaufV123, N5, 5 March 1987, P233–241 (german), P104–108 (english)
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 91 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0148-9062
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