The Online Books Page

Books by A. H. Ludwig:

Books in the extended shelves:

• Ludwig, A. H.: Flow duration and low-flow characteristics of selected Arkansas streams (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1992), also by Geological Survey (U.S.) and Arkansas Soil and Water Conservation Commission (page images at HathiTrust)
• Ludwig, A. H.: Ground-water problems in Arkansas (U.S. Geological Survey ;, 1985), also by Charles T. Bryant, Edward E. Morris, Geological Survey (U.S.), Arkansas Soil and Water Conservation Commission, and Arkansas. Department of Pollution Control and Ecology (page images at HathiTrust)
• Ludwig, A. H.: Simulation of ground-water flow in the Mississippi River Valley alluvial aquifer in eastern Arkansas (Dept. of the Interior, U.S. Geological Survey ;, 1990), also by Gary L. Mahon, Geological Survey (U.S.), and United States Army Corps of Engineers (page images at HathiTrust)

Find more by A. H. Ludwig at your library, or elsewhere.