1. Geologic setting and hydrogeologic units of the Columbia Plateau Regional Aquifer System, Washington, Oregon, and Idaho Author/Creator: Kahle, S. C. (Sue C.) Publication/Creation: [Reston, VA] : U.S. Dept. of the Interior, U.S. Geollgical Survey, 2009 Resource Type: Map Access & Availability: Loading
2. Geology, structure, and thickness of hydrogeologic units in part of the Columbia Plateau, Oregon Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Portland, Oregon : Department of the Interior, United States Geological Survey, 1990 Resource Type: Map Access & Availability: Loading