Final report : identification and characterisation of sweet potat o viruses in eastern and southern Africa, and assessment of host plant, resistance for sustainable production. - [s.l. : s.n., 2000]. - 128 p. : ill. ; 30 cm. "1st October 2000" "Duration: 36 months" Subjects--Topical Terms: Sweet potatoes -- Africa. Sweet potatoes -- Diseasea and pests -- Africa. Dewey Class. No.: 635.2298