Small, T. A., Hanson, J. A., & Hauwert, N. M. (1996). Geologic framework and hydrogeologic characteristics of the Edwards Aquifer outcrop (Barton Springs segment), northeastern Hays and southwestern Travis counties, Texas. U.S. Geological Survey.
Chicago Style (17th ed.) CitationSmall, Ted A., John A. Hanson, and Nico M. Hauwert. Geologic Framework and Hydrogeologic Characteristics of the Edwards Aquifer Outcrop (Barton Springs Segment), Northeastern Hays and Southwestern Travis Counties, Texas. Austin, Texas: U.S. Geological Survey, 1996.
MLA (9th ed.) CitationSmall, Ted A., et al. Geologic Framework and Hydrogeologic Characteristics of the Edwards Aquifer Outcrop (Barton Springs Segment), Northeastern Hays and Southwestern Travis Counties, Texas. U.S. Geological Survey, 1996.