@ARTICLE {SADIK:1975, title = {A new approach to improvement of yam (Dioscorea rotundata)}, author = {Sadik, S. and Okereke, O. U. }, journal = {Nature}, year = {1975}, volume = {254}, pages = {134--135}, issn = {0028-0836}, note = {RTB; Yam; Published 13 March 1975}, doi = {10.1038/254134a0}, }