Can small still be beautiful? Moving local sweetpotato seed systems to scale in sub-Saharan Africa. - McEwan, M.; Almekinders, Conny J.M.; Abidin, P.E.; Andrade, M.I.; Carey, E.E.; Gibson, R.W.; Naico, A.; Namanda, S.; Schulz, S. (CAB International, 2015)