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P. Bleeker and D.F. Freyne, A Preliminary Inventory of Areas Suitable for Cocoa Production in Papua New Guinea, 1981
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Arthur Stevenson, ‘Cocoa Outlook’, Futures Focus, Vol.2, No.3, 13 Mar 1989.
James Guest, The Cocoa, Coffee and Copra Price Stabilisation Schemes in Papua New Guinea’s Post-Independence Macroeconomic Policy Framework, ACIAR Working Paper No.28, 1989
