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1by Smale, M., Kaunda, Z.H.W., Makina, H.L., Mkandawire, M.M.M.K., Msowoya, M.N.S., Mwale, D.J.E.K., Heisey, P.W.
Published 1991Working Paper bibliotecaCIMMYT -
2by Smale, M., Kaunda, Z.H.W., Makina, H.L., Mkandawire, M.M.M.K., Msowoya, M.N.S., Mwale, D.J.E.K., Heisey, P.W.
Published 1992Article bibliotecaCIMMYT