Mentions ALES in passing. An advanced British undergraduate text, probably the best introduction to the subjects named in the title. Hudson , Norman. Iowa State University Press, Ames, Iowa. This practical text on soil conservation has a good chapter on the land capability approach to land evaluation.
Many examples are from Africa.
A comprehensive survey of physical land evaluation methods, including parametric systems and land capability classifications, in a wide variety of countries. Lecture notes from a graduate-level course in land evaluation methods. This is the three-volume text used by Prof. Sys in his training course for professional soil scientists. International Inst. for Land Reclamation and Improvement, Wageningen, publication 23. This is Beek's doctoral thesis, and is quite wide-ranging.