Pettijohn, R. A., Busby, J. F., & Beckman, J. D. (1992). Properties and chemical constituents in ground water from the Mississippi River Valley alluvial aquifer and permeable zone A (Holocene-upper Pleistocene deposits), south-central United States. U.S. Department of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationPettijohn, Robert A., John F. Busby, and Jeffery D. Beckman. Properties and Chemical Constituents in Ground Water from the Mississippi River Valley Alluvial Aquifer and Permeable Zone A (Holocene-upper Pleistocene Deposits), South-central United States. Austin, Texas: U.S. Department of the Interior, U.S. Geological Survey, 1992.
MLA (9th ed.) CitationPettijohn, Robert A., et al. Properties and Chemical Constituents in Ground Water from the Mississippi River Valley Alluvial Aquifer and Permeable Zone A (Holocene-upper Pleistocene Deposits), South-central United States. U.S. Department of the Interior, U.S. Geological Survey, 1992.