@ARTICLE {MKUMBIRA:2003a, title = {Grouping locations for efficient cassava evaluation in Malawi}, author = {Mkumbira, J. and Mahungu, N. and Gullberg, U. }, journal = {Experimental Agriculture}, year = {2003}, volume = {39}, pages = {167--179}, note = {RTB; Root and Tuber; Cassava}, }