Open-File Report 02-156
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First posted August 8, 2002 Reports available in PDF format Data tables (appendix A from respective report) in Excel format
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Chernoff, Carlotta B., Orris, G. J., 2002, Data set of world phosphate mines, deposits, and occurrences-- Part A. Geologic Data; Part B. Location and Mineral Economic Data: U.S. Geological Survey Open-File Report 02-156, https://pubs.usgs.gov/of/2002/0156/.