00409nam a2200157 a 450000500170000000800410001703500190005810000320007722200190010924500460012830000100017436200220018490400150020690500130022199900170023420210219153230.0991125n                      000 0 spa u  aUPN01000084919  aYanez Velaszco, Juan Carlos  aEDUCACION 2000  aLa Reforma Academica de los Bachilleratos  a55-59  a1999 Vol.5, No.51  aACb022730  aArticulo  c71574d71574