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  • All fields: Hoisting machinery--Colorado--Rio Blanco County--1900-1920.
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    • Continental Oil Shale and Refining Co., Rio Blanco Co.

    • Close-up view of the brick smokestack and timber scaffolding of a Continental Oil Shale and Refining Company retort in Rio Blanco County, Colorado. Shows pulleys or hoisting devices and ladders above a corrugated metal roof.
    • Oil-shale industry--Colorado--Rio Blanco County--1900-1920.; Rio Blanco County (Colo.)--1900-1920.; Building construction--Colorado--Rio Blanco County--1900-1920.; Hoisting machinery--Colorado--Rio Blanco County--1900-1920.;...
    • [between 1900 and 1920?]
    • Retort of the Continental Oil Shale Mining Co., Rio Blanco Colo., their own patent plant

    • Close-up view of the brick smokestack and timber scaffolding of a Continental Oil Shale Mining Company retort in Rio Blanco County, Colorado. Shows pulleys or hoisting devices and ladders above a corrugated metal building.
    • Oil-shale industry--Colorado--Rio Blanco County--1900-1920.; Rio Blanco County (Colo.)--1900-1920.; Hoisting machinery--Colorado--Rio Blanco County--1900-1920.; Refineries--Colorado--Rio Blanco County--1900-1920.
    • [between 1900 and 1920?]

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