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Oct6 14 Last Modified: 2014-10-06 22:14:30 https://serc.carleton.edu/download/files/53755/phosphorus_grp_4_student.v2.pdf
Provenance Handout created by Joy Branlund, Southwestern Illinois College, with data from USGS Mineral Commodity Summaries for Phosphate Rock (2002-2012, http://minerals.usgs.gov/minerals/pubs/commodity/phosphate_rock/) and a quotation from U.S. Secretary of State Hillary Rodham Clinton during remarks with Algerian Foreign Minister Mourad Medelci at the Department of State (Washington, D.C., January 12, 2012).
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Phosphorus Grp 4 Student Handout in PDF