1. The Groundwater Resources of the Dockum Aquifer in Texas;Bradley,2003
2. Concentration of uranium and vanadium in calcretes and gypcretes;Carlisle,1983
3. A 10 million year old ash deposit in the Ogallala Formation of the Texas Panhandle;Cepeda;Tex. J. Sci.,2006
4. Interpolating Surfaces in ArcGIS Spatial Analyst: ArcUser;Childs,2004