1. Approximate water-level changes in wells in the Chicot and Evangeline aquifers, 1977-85 and 1984-85, in the Houston-Galveston region, Texas [cartographic material] Yale Public content 1985. 2002-06-01T04:00:00Z. 2023-10-06T03:06:08Z. Geological Survey (U.S.). The Survey : [Books and Open-File Reports Section, distributor. English. cartographic image. Public. Texas, Houston Region, Galveston Region, and Harris County.