Ferrigno, C. F. (1986). Machine-readable files developed for the High Plains Regional Aquifer-System analysis in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. U.S. Dept. of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationFerrigno, Carmelo F. Machine-readable Files Developed for the High Plains Regional Aquifer-System Analysis in Parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. Denver, Colo.: U.S. Dept. of the Interior, Geological Survey, 1986.
MLA (9th ed.) CitationFerrigno, Carmelo F. Machine-readable Files Developed for the High Plains Regional Aquifer-System Analysis in Parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. U.S. Dept. of the Interior, Geological Survey, 1986.