Printed:
- Asghar, Davidson & Morrison (1986). Soil taxonomy and fertility in the South Pacific. In International Forum on Soil Taxonomy and Agrotechnology Transfer 1986: Apia, Western Samoa. Institute for Research, Extension and Training in Agriculture (IRETA), University of the South Pacific.
- Morrison (1990). Variability of Fagaga series soils of Western Samoa, Geoderma 49: 106-116.
- Naidu et al., (1991). Chemical and mineralogical properties and soil solution composition of acid soils from South Pacific Islands in, Wright et al., (Eds) Plant-soil interactions at low pH, Kluwer Academic Publishers, pp 43-53.
- Morrison & Asghar (1992). Soils of Laloanea Farm, Northwestern Upolu, Western Samoa, Pacific Science (1992) 46(1): 35-45
- Naidu et al., (1997). Clay mineralogy and surface charge characteristics of basaltic soils from Western Samoa, Clay Minerals 32:546-556
