@ARTICLE {ILONA:1992, title = {Local alternatives to plastic mulch in seed yam production}, author = {Ilona, P. and Dixon, A. }, journal = {Tropical Root and Tuber Crops Bulletin}, year = {1992}, month = {July}, volume = {6}, number = {2}, pages = {4--5}, issn = {1116-3984}, note = {RTB; Root and Tuber; Yam}, }