1. A chromatographic model for water quality variations in the Aquia aquifer (Maryland, USA);Appelo,1994
2. Geochemistry, Groundwater and Pollution;Appelo,1993
3. Geochemical calculations and observations on salt water intrusions. I. A combined geochemical/mixing cell model;Appelo;Journal of Hydrology,1987
4. Natural ion-chromatography during fresh-/sea water displacements in aquifers: A hydrogeochemical model of the past;Appelo,1989
5. Hydrochemical facies and groundwater flow pattern in northern part of Atlantic coastal plain;Back;U.S. Geological Survey Professional Paper 498-A,1966