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1972
Sims, P. K., and Jr. Mudrey, M. G.. "Syenitic Plutons and Associated Lamprophyres." In Geology of Minnesota, 140-152. Minneapolis, Minnesota: Minnesota Geological Survey, 1972.
1966
White, Walter S.. Tectonics of the Keweenawan Basin, Western Lake Superior Region In U. S. Geological Survey Professional Paper. Vol. 524-E. Department of the Interior, 1966.