1. Baker, G. H., Williams, P. M. L., Barrett, V. J., Carter, P. J. (1993) Burial of surface-applied lime by earthworms in south Australian pastures. proceedings XVII International Grassland Congress 1, 939–-941.
2. Abundance of earthworms in soils used for cereal production in south-eastern Australia and their role in reducing soil acidity;Baker,1995
3. Method for caging earthworms for use in field experiments;Baker;Soil Biology and Biochemistry,1996
4. Influence of lumbricid earthworms on yield and quality of wheat and clover in glasshouse trials;Baker;Soil Biology and Biochemistry,1997
5. Bremner, J. M. (1965) Inorganic forms of nitrogen. In: Black, C. A. (ed), Methods of soil analysis. Agronomy Mono-graph No. 9, Vol. II. ASA, Madison, pp. 1179–1237.