00350ntaaa2200145   45000030003000000050017000030080021000200400037000410820018000781000020000962450025001162500010001412600043001513000010001940120251027202647.00714s1973  ag    01   aAR-BaBNbspacAR-BaBNeaacrdRIC  a378.1000 R35u  aRibeiro, Darcy   aLa universidad nueva  a1 ed.  aBuenos Aires : bCiencia Nueva, c1973  a158 p