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by Campbell, R. H.
Published: U.S. Dept. of Interior, Geological Survey, 1955
Description: 28 leaves : illustrations, maps ; 27 cm.
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by Campbell, R. H.
Published: The Survey : Available from the Office of Technical Services, Dept. of Commerce, 1955
Description: 27 pages, 1 unnumbered folded leaf of plates : illustrations, maps ; 26 cm.
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Radioactive substances Radioactive prospecting Uranium compounds