00253nam a2200121   45000010006000000050017000069000010000231000032000332450014000657730028000799420007001079990017001145197320260918151426.0  a18783  aBÁTIZ VÁZQUEZ, Bernardo  aEditorial  gNúm.70 (2000) 3-4 pp.  c16  c51973d51973