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When, where, and how to test market
Cadbury, N. D., (1975)
Tropical exports and economic development
Ingham, Barbara, (1981)
Ghana's cocoa pricing policy
Bateman, Merrill J., (1990)
Competition between cocoa and coffee : a case study Legon
Kotey, R. A., (1972)
Akokoaso : a survey
Okali, C., (1971)
The economics of cocoa production and marketing
Kotey, R. A., (1974)