Geological Survey (U.S.), Arkansas Geological Commission, & Westerfield, P. W. (1990). Water-level maps of the Mississippi River Valley alluvial aquifer in eastern Arkansas, 1987. The Survey.
Chicago Style (17th ed.) CitationGeological Survey (U.S.), Arkansas Geological Commission, and Paul W. Westerfield. Water-level Maps of the Mississippi River Valley Alluvial Aquifer in Eastern Arkansas, 1987. Little Rock, Ark.: The Survey, 1990.
MLA (9th ed.) CitationGeological Survey (U.S.), et al. Water-level Maps of the Mississippi River Valley Alluvial Aquifer in Eastern Arkansas, 1987. The Survey, 1990.
Warning: These citations may not always be 100% accurate.