00568naa a2200205 a 450000100080000000500110000800800410001910000190006024500670007926000090014665000150015565000160017065000150018665300170020165300140021865300130023265300130024565300140025877300900027218035412017-04-17       1981    bl ---       0--  u    #d1 aEVENSON, R. E.  aBenefits and obstacles to appropriate agricultural technology.  c1981  atechnology  aAgricultura  aTecnologia  aAgricultural  aBeneficio  aBenefits  aObstacle  aObstaculo  tAnnals of the American Academy of Political and Social Sciencegv.458, p.54-67, 1981.