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- Coal Mines and Mining.✖[remove]57
- Coal mines and mining.57
- Tipples.✖[remove]57
- Coal--Transportation.20
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- Mine railroads.1
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- Island Creek Coal Company.25
- Pond Creek Pocahontas Company. Elkhorn Mine no. 3.18
- Island Creek Coal Company. Mine no. 21.2
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- Island Creek Coal Company. Mine no. 14.1
- Island Creek Coal Company. Mine no. 20.1
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- Pond Creek Pocahontas Company. Elkhorn Mine no. 1.1
- Telander, Rory J., University of Wyoming. American Heritage Center✖[remove]57
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