1. Susceptibility of major aquifers to surface contamination - Holmes, Humphreys, Issaquena, Sharkey, Washington, and Yazoo counties, Mississippi Author/Creator: Geological Survey (U.S.) Publication/Creation: Jackson, Miss. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : Can be purchased from Earth Science Information Center, Open-File Reports Section, 1993 Resource Type: Map Access & Availability: Loading