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Platinum-group elements in sedimentary environments in the conterminous United States / by Jocelyn A. Peterson ; with a section on platinum-group elements in coal by Robert B. Finkelman and Susan J. Tewalt.

Jocelyn A. Peterson [author] Robert B Finkelman (Robert Barry) [author]

Washington : United States Government Printing Office ; Denver, CO : For sale by U.S. Geological Survey, Map Distribution 1994

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