@INPROCEEDINGS {LEGG:2003a, title = {Virus diseases of root crops in Africa: Abstracts}, author = {Legg, J. and Gibson, R. and Hughes, J. }, booktitle = {Paper presented at: Thirteenth smposium of the International Society for Tropical Root Crops (ISTRC); 10-14 November}, year = {2003}, location = {Arusha, Tanzania}, note = {RTB; Root and Tuber}, }