1. Historic trail map of the Leadville 1⁰ x 2⁰ quadrangle, central Colorado Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, Va.] : U.S. Geological Survey ; Denver, CO : For sale by USGS Geological Services, 2004 Resource Type: Map Access & Availability: Loading
2. Hydrogeology and ground-water flow at Levee 31N, Miami-Dade County, Florida, July 2003 to May 2004 Author/Creator: Cunningham, Kevin J. 1953- (Kevin John) Publication/Creation: [Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey, 2004 Resource Type: Map Access & Availability: Loading