References
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- Jones, T. A. and Maliphant, G. K. (1958). “Yield variations in tree crop experiments with specific reference to cacao.” Nature 182, 1613–14.
- Urquhart, D. H. (1961). “Cocoa.” Longmans, London. 79 ff.
- Mabey, S. E. Unpublished data.
- Glendlinning, D. R. (1960). “The relationship between growth and yield in cacao varieties.” Euphytica Vol. 9, No. 3. 351–5
- van Hall, C. J. J. (1914). “Cocoa.” Macmillan, London.
- Garner, R. J. (1958). “The Grafter's Handbook.” Faber, London.