00286nam a2200121 a 4500041000800000082001800008100002800026245003400054260002400088300001900112650002000131651001300151  aspa  a333.7bL65e26  aLondoño, Carlos Mario  aEconomía agraria colombiana  aMadridbRialpc1965  a226 pbcuadros  aREFORMA AGRARIA  aCOLOMBIA