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L.A. Bridgland, A proposal for an immediate start on fermentation experiments and general feasibility study, Mar 1987, CCRI Cocoa Quality Improvement Project
Kagla C. Gimbol (Economics División), Papua New Quinea Quarterly Cocoa Market Report, October – December 1993, Rabaul, Cocoa Board of PNG, bound with Special Feature, C. Prior & E.S.C. Smith, Canker control around insect damaged bark, PNG Cocoa & Coconut Research Institute, CCRI Information Bulletin No.5, Sep 1991.
Kagla C. Gimbol & Eric Omuru (Economics Division), Papua New Quinea Quarterly Cocoa Market Report, July– September 1993, Rabaul, Cocoa Board of PNG, bound with Special Feature, Pink disease of cocoa, PNG Cocoa & Coconut Research Institute, CCRI Information Bulletin No.4, Nov 1991.
John Perkins and Trevor Clarke, Narapela pasin long ronim bisnis kakau insait long Papua Niugini, Rabaul, Aug 1980 with An Alternative Cocoa Policy for Papua New Guinea
John Perkins and Trevor Clarke, An Alternative Policy for Cocoa in Papua New Guinea: a discussion paper, Rabaul, Aug 1980
