00253nam a2200121   45000010006000000050017000069000010000231000025000332450022000587730027000809420007001079990017001145499820260918151554.0  a25176  aARTEAGA NAVA, Elisur  aEmilio Portes Gil  gNúm.3 (1979) 8-8 pp.  c16  c54998d54998