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2. Soil survey of part of County Moira;Butler;Victoria. Aust. Coun. Sci. Ind. Res. Bull.,1942
3. A field classification of soils for use in soil survey;Ellis;Sci. Agric.,1932
4. Studies on the soils developed on basic igneous rocks in central Aberdeenshire;Glentworth;Trans. Roy. Soc. Edin.,1944
5. A decimal system for the classification and mapping of Ontario soils;Hills;Sci. Agric.,1945