@ARTICLE {PORTO:1993, title = {Cassava research and development in eastern and southern Africa}, author = {Porto, M. C. M. and Asiedu, R. }, journal = {Cassava Newsletter}, year = {1993}, volume = {17}, number = {2}, pages = {1--4}, issn = {0259-3688}, note = {RTB; Root and Tuber; Cassava}, }