00540naa a2200181 a 450000100080000000500110000800800410001910000190006024500870007926000090016665000160017565000130019165300270020465300140023165300180024570000150026377300800027818338462010-06-07       1974    bl ---       0--  u    #d1 aEVENSON, R. E.  aInvestment in agricultural research and extensionba survey of international data.  c1974  aAgricultura  aPesquisa  aCentros internacionais  aExtensão  aInvestimentos1 aKISLEV, Y.  tEconomic Development and Cultural Change, Chicagogv. 23, p. 507-521, 1974.