Methods of determining the orientations of bedrock fracture systems in southwestern Pennsylvania and northern West Virginia
Electronic resources
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ii, 35 pages : digital, PDF file - Publisher: [Washington, D.C.?] : U.S. Dept. of the Interior, Bureau of Mines, [1977]
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General Note: | "1977. " GPO Cataloging Record Distribution Program (CRDP). Title from title screen (viewed on July 11, 2008). |
System Details Note: | Mode of access: Internet at the National Institute for Occupational Safety and Health web site. Address as of 7/11/08: http://www.cdc.gov/niosh/mining/pubs/pdfs/ri8217.pdf; current access available via PURL. |
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Subject: | Coal mines and mining Pennsylvania Coal mines and mining West Virginia |