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All Collections- All fields: X-9894
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- Porter process shale retort and refinery at Colorado School of Mines, Golden, Colorado
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Copy of original Rocky Mountain Photo Company of the interior of the Colorado School of Mines porter process shale retort and refinery, Golden, Colorado. -
Golden (Colo.)--1870-1890.; Refineries--Colorado--Golden--1870-1890.; Universities & colleges--Colorado--Golden--1870-1890.; Colorado School of Mines. -
[between 1875 and 1885?]
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