by von Arx, R, International Potato Center, Lima (Peru) eng, Ewell, P.T, Goueder, J, Essamet, M, Cheikh, M, Institut National de la Recherche Agronomique de Tunisie, Ariana (Tunisia) fre
Year of Publication 1988

by International Center for Agricultural Research in the Dry Areas, Aleppo (Syria) eng, Institut National de la Recherche Agronomique de Tunisie, Ariana (Tunisia) fre
Year of Publication 1986