00797   # 2200385  #4500001001000000004000500010005001700015006000300032008000400035010001400039011000500053014000700058019000500065021000500070035000500075041000700080047000500087068000500092082001300097082001100110100000500121110000500126111007700131245000500208245007300213260001500286260000900301260001000310300000500320555000500325650002000330650002100350650002500371999001500396  aLibros  aC20140826164027.0am  a  aHart, R.D  a  a22  a  a  a  aEs  a  a  aCATIE-SC  a(4055)  a  a  aReuniâon de la Asociaciâon Latinoamericana de Ciencias Agrâicolas, 10  a  aUn marco conceptual para la investigaciâon con sistemas agrâicolas  aCosta Rica  c1979  bCATIE  a  a  aInvestigaciâon  aMarco conceptual  aSistemas agrâicolas  c3796d3796