2 edition of Geologic and ground-control aspects of an experimental shortwall operation in the upper Ohio Valley found in the catalog.
Geologic and ground-control aspects of an experimental shortwall operation in the upper Ohio Valley
Noel N. Moebs
|Other titles||Shortwall operations.|
|Statement||by Noel N. Moebs and Ernest A. Curth ; Pittsburgh Mining and Safety Research Center.|
|Series||Report of investigations - Bureau of Mines ; 8112, Report of investigations (United States. Bureau of Mines) -- 8112.|
|Contributions||Curth, Ernest A., United States. Bureau of Mines., Valley Camp Coal Company.|
|The Physical Object|
|Pagination||, 30 p. :|
|Number of Pages||30|
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