21. Potentiometric surface of the alluvial aquifer and hydrologic conditions at the Río Nigua de Salinas alluvial fan, Salinas, Puerto Rico, July 9-11, 2002 Author/Creator: Rodríguez, José M. Publication/Creation: [Reston, Va.?] : U.S. Geological Survey, [2006] Resource Type: Map Access & Availability: Loading
22. Potentiometric surface of the alluvial aquifer and hydrologic conditions in the Juana Díaz area, Puerto Rico, June 29 - July 1, 2005 Author/Creator: Rodríguez, José M. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2006] Resource Type: Map Access & Availability: Loading
23. Potentiometric surface of the alluvial aquifer and hydrologic conditions near Caguas, Puerto Rico, March 1988 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: San Juan, Puerto Rico : Department of the Interior, U.S. Geological Survey, 1989 Resource Type: Map Access & Availability: Loading
24. Potentiometric surface of the Aquia aquifer in southern Maryland during September 1988 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Towson, Maryland : Department of the Interior, U.S. Geological Survey, 1990 Resource Type: Map Access & Availability: Loading
25. Potentiometric surface of the Aquia aquifer in southern Maryland during the Fall of 1986 Author/Creator: Mack, Frederick K., author Publication/Creation: Towson, Maryland : Department of the Interior, U.S. Geological Survey, 1987 Resource Type: Map Access & Availability: Loading
26. Potentiometric surface of the Aquia aquifer in southern Maryland during the fall of 1987 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Towson, Maryland : Department of the Interior, U.S. Geological Survey, 1989 Resource Type: Map Access & Availability: Loading
27. Potentiometric surface of the Aquia aquifer in southern Maryland, September 1989 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Towson, Maryland : Department of the Interior, U.S. Geological Survey, 1991 Resource Type: Map Access & Availability: Loading
28. Potentiometric surface of the Black Creek aquifer in the central coastal plain of North Carolina, December 1986 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Raleigh, North Carolina : Department of the Interior, U.S. Geological Survey, 1989 Resource Type: Map Access & Availability: Loading
29. Potentiometric surface of the Deadwood Aquifer 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
30. Potentiometric surface of the Edwards-Trinity aquifer system and contiguous hydraulically connected units, west-central Texas, winter, 1974-75 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Austin, Texas : Department of the Interior, U.S. Geological Survey, 1990 Resource Type: Map Access & Availability: Loading