Ochsner, Emma.
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creatorOf | Ritter, Etienne A. (Etienne Alphonse). Report on the Durango Girl mine of the Durango Mining and Milling Company contained in a prospectus of the company, La Plata County / by Etienne A. Ritter. | Colorado School of Mines, Arthur Lakes Library |
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associatedWith | Ritter, Etienne A. (Etienne Alphonse) | person |
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