✦ LIBER ✦
Geologic factors in predicting coal mine roof-rock stability in the upper kittanning coalbed, Somerset County, PA : Iannacchione, A T; Ulery, J P; Hyman, D M US Bureau of Mines report RI 8575, 1981, 41P
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 114 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0148-9062
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