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Hugh K. Coulter (Economist, Cocoa Board of PNG), Brief for Solomon Islands Commodities Board Personnel, Report No.18, 8 Apr 1986
Hugh K. Coulter (Economist), Papua New Guinea Cocoa Statistics, Cocoa Board of PNG, Report No.21, 16 April 1986
G.Y. Tan, Report on the 10th International Cocoa Research Conference, Santo Dominigo, Re[public of Dominicana, 17-23 May, 1987, and the New Cocoa Germplasm introduced from Miami Subtropical Research Station, c. May 1987, CCRI
G. Yong Tan (Principal Plant Breeder, PNG Cocoa and Coconut Research Institute), Annual Report Plant Breeeding Section, September 1986, Cocoa Board of PNG, Sep 1986, 27pp., bound, with Plant Breeding Working Program for 1986-87
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