Tiri Kuimbakul, Coffee Report No.37, Goroka, Coffee Industry Corporation Ltd, Industry Affairs Division, Mar 1996, 50pp.
Tiri Kuimbakul, Coffee Report No.38, Goroka, Coffee Industry Corporation Ltd, Industry Affairs Division, Jul 1996, 15pp.
Tiri Kuimbakul, Coffee Report No.39, Goroka, Coffee Industry Corporation Ltd, Industry Affairs Division, Nov 1996, 31pp.
Tiri Kuimbakul, How the international coffee market works, Coffee Discussion Paper No.12, Goroka, Coffee Industry Corporation Ltd, Industry Affairs Division, Aug 1993, 26pp.
Tiri Kuimbakul, Quarterly Coffee Report No.31, Goroka, Coffee Industry Corporation Ltd, Industry Affairs Division, Nov 1993, 31pp.
Tom Leven, (Agronomist, PNG Cocoa and Coconut Research Institute), Progress Report September, 1986: Agronomy Section, Cocoa Board of PNG, c.Sep 1986.
Trevor Clarke, Joseph Grows Cocoa, revised by Colin Benton & Jane Belfield (CQIP, Rabaul), drawings by Blasius Offele, Mar 1993
Two albums of photographs taken during a voyage to and residence in the Solomon Islands from April to October 1886, and additional loose photographs
Two reports on voyages in search of pearl shell in New Guinea and the Solomons
