1. Brown podzolic soils and their status in Britain;Ball;J. Soil Sci.,1966
2. Distribution of pyrophosphate-extractable iron and organic carbon in soils of various groups;Bascomb;Ibid.,1968
3. Genetic evaluation of profile distribution of aluminium, iron and manganese oxides;Blume;Soil Sci. Soc. Amer. Proc.,1969
4. Clayden , B. 1970 The micromorphology of ochreous B horizons of sesquioxidic brown earths developed in upland Britain Tech. Monogr. 2. Soil Survey of England and Wales 53 67
5. Die Bedeutung der freien Oxide für die Systematik der Mittelgebirgsbraunerden;Fiedler;Chem. d. Erd.,1967