Critical Mineral Resources of the United States—An Introduction

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Description An overview of the mineral resource classifications, terms, and definitions used in PP 1802. Includes a review of the history of the use and meaning of the term “critical” applied to minerals or materials.
Originators Schulz, Klaus J.; DeYoung, John H. Jr.; Bradley, Dwight C.; and Seal, Robert R. II
Publication U.S. Geological Survey Professional Paper 1802

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