@TECHREPORT {HAHN:1988b, title = {Constraints on cassava and yam research and production in Africa}, author = {Hahn, S. K. }, year = {1988}, type = {The use of biotechnology for the improvement of cassava, yams and plantain in Africa}, pages = {10--16}, institution = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {RTB; Root and Tuber; Cassava; p. 10-16}, }