Bleeker, P., & Healy, P. A. (1980). Analytical data of Papua New Guinea soils. Commonwealth Scientific and Industrial Research Organization, Australia.

Bleeker, P., and P. A. Healy. Analytical Data of Papua New Guinea Soils. Melbourne: Commonwealth Scientific and Industrial Research Organization, Australia, 1980.

Bleeker, P., and P. A. Healy. Analytical Data of Papua New Guinea Soils. Commonwealth Scientific and Industrial Research Organization, Australia, 1980.