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2 results returnedMagnetic Base Stations in Lake Superior Iron Districts
Geophysical Measurements of Gold-Bearing Gravels, Nevada County, California
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Subject
- Prospecting -- Geophysical methods. (2) *
- Gold mines and mining -- California -- Nevada County. (1)
- Iron ores -- Michigan -- Lake Superior. (1)
- Iron ores -- Minnesota -- Lake Superior. (1)
- Iron ores -- Wisconsin -- Lake Superior. (1)
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