The Online Books Page

Books by Allan K. Clark:

Books in the extended shelves:

• Clark, Allan K.: Geologic framework and hydrogeologic characteristics of the Edwards aquifer, Uvalde County, Texas (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2003), also by Geological Survey (U.S.) and Edwards Aquifer Authority (Tex.) (page images at HathiTrust)
• Clark, Allan K.: Geologic framework and hydrogeologic features of the Glen Rose Limestone, Camp Bullis training site, Bexar County, Texas (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2003), also by United States Army and Geological Survey (U.S.) (page images at HathiTrust)
• Clark, Allan K.: Geologic framework of the Edwards aquifer and upper confining unit, and hydrogeologic characteristics of the Edwards aquifer, south-central Uvalde County, Texas (U.S. Dept. of the Interior, U.S. Geological Survey ;, 1997), also by Ted A. Small, Geological Survey (U.S.), and San Antonio Water System (Tex.) (page images at HathiTrust)
• Clark, Allan K.: Vulnerability of ground water to contamination, Edwards aquifer recharge zone, Bexar County, Texas, 1998 (U.S. Dept. of the Interior, U.S. Geological Survey ;, 2000), also by Geological Survey (U.S.) and San Antonio Water System (Tex.) (page images at HathiTrust)

Find more by Allan K. Clark at your library, or elsewhere.