1. 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
2. Map showing susceptibility to rainfall-triggered landslides in the municipality of Ponce, Puerto Rico Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, VA] : U.S. Dept. of the Interior, U.S. Geological Survey, 2004 Resource Type: Map Access & Availability: Loading
3. Metropolitan and micropolitan statistical areas of the United States and Puerto Rico, June 6, 2003 ; Combined statistical areas of the United States and Puerto Rico, June 6, 2003 Author/Creator: United States. Bureau of the Census. Geography Division Publication/Creation: [Washington, D.C.] : U.S. Dept. of Commerce, Economics and Statistics Administration, U.S. Census Bureau, [2003] Resource Type: Map Access & Availability: Loading