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Publication Extents

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Uranium in the metal-mining districts of Colorado
Robert Ugstad King, B. F. Leonard, F. B. Moore, C. T. Pierson
1953, Circular 215
Many varieties of abnormally radioactive rocks and ores have been found in Colorado as a result of more than eight years of geologic studies by the U. S. Geological Survey, but only a small proportion of these contain uranium in sufficient quantities to be of possible commercial interest....