Litke, D. W. (2001). Historical water-quality data for the High Plains Regional Ground-Water Study Area in Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1930-98. U.S. Dept. of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationLitke, David W. Historical Water-quality Data for the High Plains Regional Ground-Water Study Area in Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1930-98. Denver, Colo.: U.S. Dept. of the Interior, U.S. Geological Survey, 2001.
MLA (9th ed.) CitationLitke, David W. Historical Water-quality Data for the High Plains Regional Ground-Water Study Area in Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1930-98. U.S. Dept. of the Interior, U.S. Geological Survey, 2001.