1. Pennsylvania Publication/Creation: [S.l.] : Maps.com, c2002 Resource Type: Map Access & Availability: Loading
2. Potentiometric surfaces, altitudes of the tops, and hydrogeology of the Minnelusa and Madison Aquifers, Black Hills area, Wyoming Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, Va.?] : U.S. Geological Survey, 2002 Resource Type: Map Access & Availability: Loading