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- catalog contributor b7093936.
- catalog contributor b7093937.
- catalog created "1936.".
- catalog date "1936".
- catalog date "1936.".
- catalog dateCopyrighted "1936.".
- catalog extent "40 p.".
- catalog issued "1936".
- catalog issued "1936.".
- catalog language "eng".
- catalog publisher "Pittsburgh : University,".
- catalog spatial "Pennsylvania.".
- catalog spatial "United States.".
- catalog subject "Bituminous coal.".
- catalog subject "Coal trade Pennsylvania.".
- catalog subject "Coal trade United States.".
- catalog title "Regional shifts in the bituminous coal industry : a summary; what have been their extent, their causes and their effects ? What can be done about instability in the soft coal industry ?".
- catalog type "text".