Contributions to economic geology, 1922, Part I, Metals and nonmetals except fuels--Silver enrichment in the San Juan Mountains, Colorado
Peter Popenoe
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Robert G. Luedke
Harald H. Mehnert
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John F. Slack
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Gerald T. Cebula
Philip Martin Bethke
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Robert O. Rye
Douglas B. Yager
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Peter W. Lipman
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David A. Sawyer
Wilbur Swett Burbank
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Robert G. Luedke
Kelley Jane Ivers
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Jared M. Beeton
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Jacqueline A. Smith
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Bradley G. Johnson