APA (7th ed.) Citation

Dugan, J. T., & Schild, D. E. (1992). Water-level changes in the High Plains aquifer--predevelopment to 1990. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Dugan, Jack T., and Donald E. Schild. Water-level Changes in the High Plains Aquifer--predevelopment to 1990. Lincoln, Neb.: U.S. Dept. of the Interior, U.S. Geological Survey, 1992.

MLA (9th ed.) Citation

Dugan, Jack T., and Donald E. Schild. Water-level Changes in the High Plains Aquifer--predevelopment to 1990. U.S. Dept. of the Interior, U.S. Geological Survey, 1992.