George Schwartz
George M. Schwartz was a professor of geology and mineralogy at the University of Minnesota and director of the Minnesota Geological Survey. George A. Thiel was a professor of geology and mineralogy at the University of Minnesota.
George M. Schwartz was a professor of geology and mineralogy at the University of Minnesota and director of the Minnesota Geological Survey. George A. Thiel was a professor of geology and mineralogy at the University of Minnesota. See less
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