Text ( visual ) : unmediated Tropical root crops : root crops and the African food crisis : proceedings of the Third Triennial Symposium of the International Society for Tropical Root Crops--Africa Branch held in Owerri, Nigeria, 17-23 August 1986 / editors, E.R. Terry, M.O. Akoroda, and O.B. Arene. -- : pbk.. -- Ottawa, Ont., Canada : International Development Research Centre , c1987. -- iv, 197 p. : ill. ; 25 cm. -- (IDRC ; 258e). -- Bibliography: p. 166-190. -- ISBN 0889364982 ; (BA06661687) ; https://ci.nii.ac.jp/ncid/BA06661687 Author Heading(s): International Society for Tropical Root Crops. Africa Branch. Symposium ; Terry, E. R. ; Akoroda, M. O. ; Arene, O. B.. -- Classification(s): LCC : SB210.T76 ; DC19 : 630/.913. -- Subject Heading(s): LCSH : Root-crops -- Tropics -- Congresses ; LCSH : Root-crops -- Africa -- Congresses ; LCSH : Tropical crops -- Congresses ; LCSH : Tropical crops -- Africa -- Congresses ; LCSH : Food supply -- Africa -- Congresses