John H. Mossler, project manager ; map production coordinated by Lynn Swanson and Timothy E. WahlUniversity of Minnesota, Minnesota Geological Survey[1995]
Gary N. Meyer, project manager ; map production coordinated by Lynn Swanson and Timothy E. WahlUniversity of Minnesota, Minnesota Geological Survey[1995]
Howard C. Hobbs, project manager ; map production coordinated by N.H. Balaban and Timothy E. WahlUniversity of Minnesota, Minnesota Geological Survey[1995]