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by Hovland, R. David.
Published: Dept. of the Interior, U.S. Geological Survey, 1985
Description: 1 volume : illustrations, map ; 28 cm.
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by Oberlindacher, H. Peter.
Published: Dept. of the Interior, U.S. Geological Survey : [Books and Open-file Reports Section, distributor], 1986
Description: 1 microfiche : negative, map.
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Geochemical prospecting Geology, Stratigraphic Phosphate rock Phosphates