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Chemical elements / Mining in the Democratic Republic of the Congo / Poor metals / Post-transition metals / Conflict minerals / Ore / Wolframite / Coltan / Tantalum / Chemistry / Matter / Oxide minerals


SBE, Inc. 81 Parker Rd. Barre, VT[removed]USA Tel: [removed]Fax: [removed]E-mail: [removed]
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Document Date: 2013-09-05 13:16:13


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