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Preliminary map of rare-earth provinces in the conterminous United States
Scanned image of map drawn at 1:5,000,000 scale, projection probably Lambert Conformal Conic, monochrome. |
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Map of thorium provinces in the conterminous United States
Scanned image of map drawn at 1:5,000,000 scale, projection probably Lambert Conformal Conic, monochrome. |
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