Holm, D., Schmus, W., MacNiell, L., Boerboom, T., Schweitzer, D., & Schneider, D. (2005). U-Pb Zircon Geochronology of Paleoproterozoic Plutons from the Northern Midcontinent, USA: Evidence for Subduction Flip and Continued Convergence after Geon 18 Penokean Orogenesis. Geological Society of America. https://doi.org/10.1130/B25395.1
Holm, Daniel, W Schmus, Leah MacNiell, Terrence Boerboom, Daniel Schweitzer, and David Schneider. 2005. “U-Pb Zircon Geochronology of Paleoproterozoic Plutons from the Northern Midcontinent, USA: Evidence for Subduction Flip and Continued Convergence After Geon 18 Penokean Orogenesis”. Geological Society of America. https://doi.org/10.1130/B25395.1.
Holm, D., W. Schmus, L. MacNiell, T. Boerboom, D. Schweitzer, and D. Schneider. U-Pb Zircon Geochronology of Paleoproterozoic Plutons from the Northern Midcontinent, USA: Evidence for Subduction Flip and Continued Convergence After Geon 18 Penokean Orogenesis. Geological Society of America, 1 Mar. 2005, doi:10.1130/B25395.1.