✦ LIBER ✦
In support of longwalling : Morgan, D Colliery Guard Coal Intern, V228, N3, July 1980, P28–33
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 93 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0148-9062
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