00378nam a2200157 a 450000500170000000800410001703500190005810000290007722200110010624500210011730000100013836200270014890400150017590500130019099900170020320210219153451.0991125n                      000 0 spa u  aUPN01000101614  aArellano Carrillo, Cesar  aPLEXOS  aTareas escolares  a24-27  a1996 No. 13, ene.-mar.  aACb039425  aArticulo  c77665d77665