1. Het Dwingelderveld, Deelrapport Geohydrologie;Bakker;SBB 1984-29,1984
2. Submicroscopic examination of soils;Bisdom;Adv. Agron.,1983
3. Submicroscopic studies of soils,1983
4. A method for measuring the vertical and horizontal Ksat of clay soils with macropores;Bouma;Soil Sci. Soc. Am. J.,1981
5. Fabric and Mineral Analysis of Soils;Brewer,1964