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- catalog contributor b8438588.
- catalog contributor b8438589.
- catalog contributor b8438590.
- catalog created "1923]".
- catalog date "1923".
- catalog date "1923]".
- catalog dateCopyrighted "1923]".
- catalog extent "12 p.".
- catalog issued "1923".
- catalog issued "1923]".
- catalog language "eng".
- catalog publisher "[Philadelphia?".
- catalog spatial "United States.".
- catalog subject "Coal miners United States.".
- catalog subject "HD8039.M62 U6247".
- catalog subject "United Mine Workers of America.".
- catalog title "Union rules and practices, limiting output and impairing efficiency in the anthracite fields; submitted to the United States Coal commission on behalf of the General policies committee of anthracite operators, May 51, 1923.".
- catalog type "text".