00371nam a2200145 a 450000100080000000500110000800800410001910000160006024500560007626000320013230000090016465300160017365300190018965300170020810139182000-08-16       1971    bl uuuu     u0uu1 u    #d1 aPAIVA, R.M.  aModernizacao e dualismo tecnologico na agricultura.  aRio de Janeiro: ABCARc1971  a63p.  aAGRICULTURA  aEXTENSAO RURAL  aMODERNIZACAO