1. Extraction and characterization of humus with reference to clay-associated humus;Anderson;Can. J. Soil Sci.,1974
2. Fractionation and characterization of naturally occurring organo-mineral complexes;Arshad,1966
3. Recovery of heavy liquids from dilute solutions;Benjamin;Am. Mineral.,1971
4. The soils of Country Grey South Australia;Blackburn;CSIRO Aust. Div. Soil, Soils Land Use Ser., No. 33,1959
5. Total nitrogen;Bremner,1965