00998nam a2200265 a 450000500170000000800410001701000170005802000150007504000230009004100160011305000230012908200260015210000220017824501270020026000520032730000330037944000530041250000370046550400410050265000430054365000340058665000470062065000400066770000250070720181210083249.0840809s1984    dcub     b   i000 0 eng    a   84017405   a0821303988  aDLCcDLCdBD-DhBPA0 aengbfrespa00aS472.C46bJ66 198400a630.967219bJOF 19841 aJones, William I.10aFarming systems in Africa :bthe great lakes highlands of Zaire, Rwanda, and Burundi /cWilliam I. Jones and Roberto Egli.  aWashington, D.C., U.S.A. :bWorld Bank,cc1984.  axi, 107 p. :bmaps ;c28 cm. 0aWorld Bank technical paper,x0253-7494 ;vno. 27  aSummaries in French and Spanish.  aIncludes bibliographical references. 0aAgricultural systemszAfrica, Central. 0aAgriculturezAfrica, Central. 0aAgricultural innovationszAfrica, Central. 0aSoil conservationzAfrica, Central.1 aEgli, Robertod1919-