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- catalog contributor b6811659.
- catalog created "1930.".
- catalog date "1930".
- catalog date "1930.".
- catalog dateCopyrighted "1930.".
- catalog extent "iii, 63 p. :".
- catalog isPartOf "Bulletin of the United States Bureau of Labor Statistics ; 516.".
- catalog isPartOf "Bulletin of the United States Bureau of Labor Statistics ; no. 516".
- catalog isPartOf "Wages and hours of labor series".
- catalog issued "1930".
- catalog issued "1930.".
- catalog language "eng".
- catalog publisher "Washington, Govt. Print. off.,".
- catalog spatial "United States.".
- catalog subject "Coal miners United States.".
- catalog subject "Coal mines and mining United States.".
- catalog subject "Hours of labor United States.".
- catalog subject "Wages United States.".
- catalog title "Hours and earnings in bituminous coal mining, 1929.".
- catalog type "text".