University of Minnesota Ph.D. dissertation. September 1922. Major: Geology. Advisor: Dr. W. H. Emmons and Dr. F. F. Grout. 1 computer file (PDF); 54 pages. [407-460]. Reprinted in Economic Geology.
Gruner, John Walter.
The Origin of Sedimentary Iron Formations: The Biwabik Formation of the Mesabi Range.
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