Sweetpotato variety evaluation / E.T. Rasco, Jr. and V. d.R. Amante, editors. - 2nd ed. - Los Banos, Philippines : SAPPRAD, 1994. - v. v.1: Training manual.-- v.2: Background papers and SAPPRAD country reports. ISBN: 9719020016 Subjects--Topical Terms: Sweet potatoes--Varieties.