1. Soil Physics;Baver,1972
2. Soil Chemistry. A. Basic Elements;Bolt,1978
3. Rill initiation: Concept and experimental evaluation on badland slopes;Bowyer-Bower;Zeitschrift fur Geomorphologie N.F.,1986
4. The Nature and Properties of Soils;Brady,2002
5. Crystal structures of Clay Minerals and Their Identification;Brindley,1980