Baker, C. H., Jr., Leonard, R. B. 1995. Hydrochemistry of Aquifer Systems and Relation to Regional Flow Patterns in Cretaceous and Older Rocks Underlying Kansas, Nebraska, and Parts of Arkansas, Colorado, Missouri, New Mexico, Oklahoma, South Dakota, Texas and Wyoming (WRIR-94-4144). 53 pp., size 8.5" x 11". Description: This report describes the chemical character of the water contained in the regional geohydrologic systems and to discuss the causes of the hydrochemical variability and relations to regional flow patterns.