Hulse, J.H.Zeeuw, R. de2007-11-131979-04-012007-11-131979http://hdl.handle.net/10625/16861Meeting: International Symposium on Science and Technology for Development, Jan. 1979, Singapore, SGPhotocopyText1 digital file (p. 171-173)Application/pdfenAPPLIED RESEARCHAGRICULTURAL RESEARCHMANPOWER NEEDSDEVELOPING COUNTRIESBook Chapter