Longitudinal section running from the main shaft to the west : and from the main to the Ventura shaft east showing also other workings on the hillside : [Mineral de las Adargas, Chihuahua, Mexico] / E. Bronimann. 1908.

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Longitudinal section running from the main shaft to the west : and from the main to the Ventura shaft east showing also other workings on the hillside : [Mineral de las Adargas, Chihuahua, Mexico] / E. Bronimann. 1908.

1 ms. map profile : col. ; on sheet 53 x 119 cm.

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Bronimann, E. (Emil)

http://n2t.net/ark:/99166/w6sq8zj0 (person)