Ashworth, J. B. (1983). Ground-water availability of the Lower Cretaceous formations in the Hill Country of south-central Texas. Texas Dept. of Water Resources.
Chicago Style (17th ed.) CitationAshworth, John B. Ground-water Availability of the Lower Cretaceous Formations in the Hill Country of South-central Texas. Austin, Tex.: Texas Dept. of Water Resources, 1983.
MLA (9th ed.) CitationAshworth, John B. Ground-water Availability of the Lower Cretaceous Formations in the Hill Country of South-central Texas. Texas Dept. of Water Resources, 1983.
Warning: These citations may not always be 100% accurate.