Geology and metallogeny of Archean and Proterozoic basement terranes in the northern midcontinent, U.S.A.--an overview / by P.K. Sims, Eva B. Kisvarsanyi, G.B. Morey ; prepared in cooperation with the Missouri Geological Survey and Minnesota Geological Survey
(Contribution to the geology of the midcontinent region) (U.S. Geological Survey bulletin ; 1815)