1. The origins and epidemiology of some important plant virus diseases;Thresh;Appl. Biol.,1980
2. Swollen shoot and die-back-a new disease of cocoa;Steven;Gold Coast Farmer,1936
3. “Transmission of ‘swollen shoot’ disease of Cacao;Posnette;Trop. Agric. Trinidad Tobago,1940
4. Insect transmission of the ‘swollen-shoot’ virus in West African cacao [9];Box;Nature,1945
5. Botany and Physiology;Archibald,1954