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- Successful system for signaling from mine cages at rest or in motion
- A study of the tungsten potential in Boulder County, Colo.
- Tungsten potential in Chaffee, Fremont, Gunnison, Lake, Larimer, Park and Summit Counties, Colo.
- Tungsten potential in the San Juan area, Ouray, San Juan, and San Miguel Counties, Colo.
- Tungsten mining and milling in Boulder County, Colo.