00253nam a2200121   45000010006000000050017000069000010000231000032000332450014000657730028000799420007001079990017001145177020260918151421.0  a18038  aBÁTIZ VÁZQUEZ, Bernardo  aEditorial  gNúm.58 (1998) 3-4 pp.  c16  c51770d51770