00350cam a2200169   450000500170000024500290001702000050004610000180005104400160006925000090008504100080009430000230010250000050012583000060013026000260013608200180016220260711133815.0  aEstadistica General IIb  a  aPacheco, Rene  aEl Salvador  a1ª   aspa  a220 p. il.; 21 cm.  a  v2  aSan Salvador bc1985  a519.53bP116e