@BOOK {IBEKWE:1979, title = {Sweet potato (Ipomea batatas L.)}, author = {Ibekwe, G. O. }, booktitle = {Abstracts of selected research and development literature from 1949-1979}, series = {Information series No. 6}, year = {1979}, publisher = {International Institute of Tropical agriculture (IITA)}, address = {Ibadan}, note = {page VIII - 260}, }