Cocoa Growers' Bulletin No.31 July 1981

Cocoa Growers' Bulletin No.50 Desember 1996

Cocoa Growers' Bulletin No.51 June 1998

Cocoa Growers' Bulletin No.52 November 2000

Cocoa Growers' Bulletin No.42 Desember Thn.1989 - No.49 Oktober Thn.1995

Cocoa Growers' Bulletin No.33 Oktober Thn.1982 - No.38 May Thn.1987

Cocoa Growers' Bulletin No.28 May Thn.1979

Cocoa Growers' Bulletin No.30 Desember Thn.1980