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  1. Høyrup, E.: Books about mathematics : history, philosophy, education, models, system theory, and works of reference etc (1979) 0.04 
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    Date
    9. 1.1999 18:29:29
  2. Bibliografia nazionale italiana : 1(1958) - 36(1993) ungeteilt; 39(1996), 1-12 (gedruckte Ausg. + Diskette) (1996-) 0.01 
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    Date
    19. 3.1998 11:23:22

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