01049nam a2200253 a 450000500170000000800410001701000170005802000150007504000230009004100160011305000220012908200260015110000210017724501320019826000440033030000340037444000570040850400540046561000500051965000670056965000780063665000510071470000300076520181210082930.0970108s1997    dcua     b    000 0 eng    a   97003416   a0821338781  aDLCcDLCdBD-DhBPA0 aengbfrespa00aS544.6b.P86 199700a630.715221bPUA 19971 aPurcell, Dennis.10aAgricultural extension and research :bachievements and problems in national systems /cDennis L. Purcell and Jock R. Anderson.  aWashington, D.C. :bWorld Bank,cc1997.  axxi, 282 p. :bill. ;c28 cm. 2aA World Bank operations evaluation study,x1011-0984  aIncludes bibliographical references (p. 257-264).20aWorld BankzDeveloping countriesxEvaluation. 0aAgricultural extension workzDeveloping countriesxEvaluation. 0aNational agricultural research systemszDeveloping countriesxEvaluation. 0aAgricultural development projectsxEvaluation.1 aAnderson, Jock R.,d1941-