1. Amosson , S. L. Almas B.B. Golden B. Guerrero J.W. Johnson R. Taylor E. Wheeler-Cook 2009 www.depts.ttu.edu/casnr/water/ConservationPolicies_Ogallala.pdf
2. Irrigated agriculture and ground-water mining on the High Plains of Texas, USA.;Beaumont;Environmental Conservation,1985
3. Groundwater and the law.;Charalambous;Quarterly Journal of Engineering Geology and Hydrogeology,2011
4. DWR (Division of Water Resources, Kansas Department of Agriculture). 2012 http://www.ksda.gov/dwr/content/314/cid/19531