P.M. Bodman, Coffee Report No.13, Goroka, PNG Coffee Industry Board, Oct 1988, 11pp. & appendices.
P.E. Harding, A Preliminary Report on the Arabica Coffee Soils of Papua New Guinea, Coffee Industry Research report No.1, PNG Coffee Research Institute, Kainantu, Dec 1984, 70pp.
P.E. Harding, A Preliminary Report on the Arabica Coffee Soils of Papua New Guinea, Coffee Industry Research report No.1, PNG Coffee Research Institute, Kainantu, Dec 1984, 70pp.
P.E. Harding, A Preliminary Report on the Arabica Coffee Soils of Papua New Guinea, Coffee Industry Research report No.1, PNG Coffee Research Institute, Kainantu, Dec 1984, 70pp.
P.D. Turner, Cocoa Industry Board, Papua New Guinea, Cocoa Research Centre – Tavilo: research requirements and priorities, Feb 1982, Cocoa Industry Board of PNG
P.D. Turner (Harrisons Fleming), Cocoa Research Centre – Tavilo: Research review 1985, Cocoa Board of PNG