00826nam a2200277 a 450000100080000000500110000800800410001902000190006010000170007924501100009626000370020630000100024349000370025365000160029065000360030665000230034265000150036565000180038065000120039865000300041065000230044065000190046365000320048270000170051470000170053110169292014-02-22       1995    bl uuuu     u00u1 u    #d  a 0-8014-2937-41 aALSTON, J.M.  aScience under scarcitybprinciples and practice for Agricultural Research Evaluation and Priority Setting  aIthaca: Cornell Universityc1995  a585p.  aFood Systems and Agrarian Change  aAGRICULTURA  aANALISIS DE COSTOS Y BENEFICIOS  aANALISIS ECONOMICO  aEVALUACION  aINVESTIGACION  aMODELOS  aPOLITICA DE INVESTIGACION  aPOLITICA ECONOMICA  aSOSTENIBILIDAD  aTRANSFERENCIA DE TECNOLOGIA1 aNORTON, G.W.1 aPARDEY, P.G.