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Critical mineral resources of the United States—An introduction [研究报告]
10.3133/pp1802AU.S. Geological Survey. 2017-01-01
Schulz, Klaus J. kschulz@usgs.gov;  DeYoung, John H. Jr. jdeyoung@usgs.gov;  Seal, Robert R. II rseal@usgs.gov;  Bradley, Dwight C. dbradley@usgs.gov
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