Fact Sheet 2004-3086 Monitoring Water-Level and Water-Quality Response to Conservation Measures in the Sparta Aquifer of the Union County, Arkansas Area by D.S. Yeatts
Fact Sheet 2006-3090 Monitoring the Recovery of the Sparta Aquifer in Southern Arkansas and Northern Louisiana by R.M. Hart and D.A. Freiwald
Fact Sheet 2007-3102 Monitoring of Sparta Aquifer Recovery in Southern Arkansas and Northern Louisiana, 2003–07 by D.A. Freiwald and S.F. Johnson