1. Geologic map of Precambrian rocks of the Sierra Madre, Carbon County, Wyoming, and Jackson and Routt counties, Colorado Author/Creator: Houston, Robert S. 1923- (Robert Stroud) Publication/Creation: Reston, Va. : U.S. Geological Survey, 1995 Resource Type: Map Access & Availability: Loading
2. Geologic map of Precambrian rocks, southern Lake Superior region, Wisconsin and northern Michigan Author/Creator: Geological Survey (U.S.) Publication/Creation: Reston, Va. : U.S. Geological Survey, 1992 Resource Type: Map Access & Availability: Loading