Colorado Portland Cement and Wall Plaster plants of Portland Cement Company. Fremont County, Colorado. No Date.
Summary
Colorado Portland Cement and Wall Plaster plants of Portland Cement Company in center, shale quarry seen on upper left horizon, Portland. Fremont County, Colorado. n.d.
Summary
Colorado Portland Cement and Wall Plaster plants of Portland Cement Company in center, shale quarry seen on upper left horizon, Portland. Fremont County, Colorado. n.d.
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