1. Altitude and configuration of the potentiometric surface in the Triassic sandstones and shales, northeastern Chester County, Pennsylvania, September 1987 through January 1988 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Reston, Virginia : Department of the Interior, U.S. Geological Survey, 1989 Format: Map Access & Availability: Loading
2. Altitude of the potentiometric surface and changes in water levels in the Sparta-Memphis aquifer in eastern and southern Arkansas, spring 1986 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Little Rock, Arkansas : Department of the Interior, U.S. Geological Survey, 1989 Format: Map Access & Availability: Loading
3. Atlante tematico d'Italia Author/Creator: Touring club italiano Publication/Creation: Milano : Touring Club Italiano, 1989-1992 Format: Map Access & Availability: Loading
4. Atlas del Perú Author/Creator: Instituto Geográfico Nacional (Peru) Publication/Creation: Lima, Perú : El Instituto, [1989] Format: Map Access & Availability: Loading