1. Regional estimation of base flow and groundwater recharge in the Upper Mississippi river basin;Arnold;Journal of Hydrology,2000
2. Baker, D.G., Kuehnast, E.L, Zandlo, J.A., 1985. Climate of Minnesota—Part XV, Normal Temperatures (1951–1980) and their Application. University of Minnesota Technical Bulletin AD-SB-2777-1985.
3. Baker, D.G., Nelson, W.W. Kuehnast, E.L. 1979. Climate of Minnesota—Part XII, The Hydrologic Cycle and Soil Water. University of Minnesota Technical Bulletin 322.
4. Groundwater recharge and agricultural contamination;Böhlke;Hydrogeology Journal,2002
5. Use of chlorofluorocarbons (CCl3F and CCl2F2) as hydrologic tracers and age—dating tools: Example–The alluvium and terrace system of central Oklahoma;Busenberg;Water Resources Research,1992