Strengthening national agricultural research systems in the humid and sub-humid zones of West and Central Africa : a framework for action / Ajibola Taylor ... [et al.]. Taylor, T. Ajibola...[et. al.] National agricultural research systems Africa, West. S542.A428 S88 1996 338.160967 20 STR Includes bibliographical references Washington : World Bank, c1996. c1996. 1996 Text xxi, 96 p. ; eng World Bank technical paper, 0253-7494 ; no. 318. Africa Technical Department series World Bank technical paper ; no. 318. World Bank technical paper. Africa Technical Department series. Africa, West.