1. La classification pédologique utilisée en France;Aubert;Pédologie, No. Spec.,1965
2. Soil classification in Britain;Avery;Pédologie, No. Spec.,1965
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4. On soil genesis in temperate humid climate VI. The formation of a glossudalf in loess (silt loam);Bouma;Neth. J. Agr. Sci.,1968
5. Fabric and Mineral Analysis of Soils;Brewer,1964