1. Map showing spatial and temporal relations of mountain and continental glaciations on the Northern Plains, primarily in northern Montana and northwestern North Dakota Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, Colo. : For sale by USGS Information Services Resource Type: Map Edition: Version 1.0. Access & Availability: Loading
2. Map showing spatial and temporal relations of mountain and continental glaciations on the Northern Plains, primarily in northern Montana and northwestern North Dakota Publication/Creation: Lakewood, Colo. : U.S. Geological Survey, 2004 Resource Type: Map Edition: Version 1.0. Access & Availability: Loading