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- 50014812 contributor B1185001.
- 50014812 contributor B1185002.
- 50014812 created "1950.".
- 50014812 date "1950".
- 50014812 date "1950.".
- 50014812 dateCopyrighted "1950.".
- 50014812 description "Bibliographical footnotes.".
- 50014812 extent "iii, 128 p.".
- 50014812 issued "1950".
- 50014812 issued "1950.".
- 50014812 language "eng".
- 50014812 publisher "[n. p.]".
- 50014812 spatial "United States.".
- 50014812 subject "338.2724".
- 50014812 subject "Coal miners United States.".
- 50014812 subject "Coal mines and mining United States.".
- 50014812 subject "HD4966.M63 U415".
- 50014812 subject "Labor productivity United States.".
- 50014812 subject "Wages United States.".
- 50014812 title "Bituminous coal wages, profits, and productivity. Prepared for Southern Coal Producers Association; presented before Presidential Coal Board.".
- 50014812 type "text".