Books by Ohio Joint conference of coal operators and coal miners of Western Pennsylvania:
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Joint conference of coal operators and coal miners of Western Pennsylvania, Ohio, Indiana and Illinois: Proceedings (1898) (page images at HathiTrust)- Joint Conference of Coal Operators and Coal Miners of Western Pennsylvania, Ohio, and Indiana: Proceedings of ... Joint Conference of Coal Operators and Coal Miners of Western Pennsylvania, Ohio, Indiana and Illinois. ([Columbus?, Ohio, 1887), also by F. S. Brooks and United Mine Workers of America (page images at HathiTrust)
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