1. Delineation of saltwater intrusion in the surficial aquifer system in eastern Palm Beach, Martin, and St. Lucie Counties, Florida, 1997-98 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 1999 Resource Type: Map Access & Availability: Loading
2. Development of a 14-digit hydrologic unit code numbering system for South Carolina Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Columbia, South Carolina : U.S. Department of the Interior, U.S. Geological Survey, 1999 Resource Type: Map Access & Availability: Loading
3. The difference between the potentiometric surfaces of the Aquia Aquifer, September 1982 and September 1997 in Southern Maryland Author/Creator: Curtin, Stephen E. Publication/Creation: Denver, Colo. : Branch of Information Services [distributor]. Resource Type: Map Access & Availability: Loading
4. The difference between the potentiometric surfaces of the lower Patapsco Aquifer, September 1990 and September 1997 in Southern Maryland Author/Creator: Curtin, Stephen E. Publication/Creation: Denver, Colo. : Branch of Information Services [distributor]. Resource Type: Map Access & Availability: Loading
5. The difference between the potentiometric surfaces of the Magothy Aquifer, September 1975 and September 1997 in Southern Maryland Author/Creator: Curtin, Stephen E. Publication/Creation: Denver, Colo. : Branch of Information Services [distributor]. Resource Type: Map Access & Availability: Loading
6. The difference between the potentiometric surfaces of the upper Patapsco Aquifer, September 1990 and September 1997 in Southern Maryland Author/Creator: Curtin, Stephen E. Publication/Creation: Denver, Colo. : Branch of Information Services [distributor]. Resource Type: Map Access & Availability: Loading
7. Digital geologic map database of the Payette National Forest and vicinity, Idaho Publication/Creation: [Reston, Va.?] : The Survey, 1999 Resource Type: Map Access & Availability: Loading
8. Digital geologic map of Yellowstone National Park, Idaho, Montana, and Wyoming and vicinity Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, Va.?] : The Survey, [1999] Resource Type: Map Edition: Online version 1.0, 5 April 1999. Access & Availability: Loading
9. Distribution of hydrogeologic units in the Black Hills area, South Dakota Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : Information Services [distributor] Resource Type: Map Access & Availability: Loading