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- catalog contributor b4001233.
- catalog contributor b4001234.
- catalog contributor b4001235.
- catalog created "1992.".
- catalog date "1992".
- catalog date "1992.".
- catalog dateCopyrighted "1992.".
- catalog description "Includes bibliographical references.".
- catalog extent "20 p. :".
- catalog isPartOf "Information circular (United States. Bureau of Mines) ; 9331".
- catalog isPartOf "Information circular ; 9331".
- catalog issued "1992".
- catalog issued "1992.".
- catalog language "eng".
- catalog publisher "Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines,".
- catalog spatial "Pennsylvania Cambria County.".
- catalog subject "622 s 622/.334 20".
- catalog subject "Longwall mining Pennsylvania Cambria County.".
- catalog subject "Mine roof control Testing.".
- catalog subject "TN295 .U4 TN288".
- catalog title "Longwall gate road roof instability and methods of control in the lower Kittanning Coalbed of Central Pennsylvania/ by E.R. Bauer, J.M. Listak,and E.D. Krupa.".
- catalog type "text".