1. Quality of freshwater in aquifers of Louisiana, 1988 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Baton Rouge, Louisiana : U.S. Department of the Interior, U.S. Geological Survey, 1992 Format: Map Access & Availability: Loading
2. Quality of water resources of the Ouachita National Forest, Arkansas Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Little Rock, Arkansas : U.S. Department of the Interior, U.S. Geological Survey, 1986 Format: Map Access & Availability: Loading