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Kingman (vicinity), Arizona. A general view showing a huge waste pile and beyond it the recovery plant where tungsten ore is processed. The ore is mined in the nearby Boriana workings
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Kingman (vicinity), Arizona. Mr. Relling, in the laboratory, analyzing tungsten ore and concentrates in a plant near the Boriana mines where the chromium-like metallic elements are obtained
Kingman (vicinity), Arizona. Mr. Relling, scientist in the laboratory of a concentrating plant, analyzing tungsten ore over a hot plate
Kingman (vicinity), Arizona. Mr. Relling, scientist in the laboratory of a concentrating plant, analyzing tungsten ore over a hot plate