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  • × language_ss:"m"
  • × type_ss:"m"
  • × year_i:[1970 TO 1980}
  1. Klassifikationssystem 1977. Classification Scheme 1977 (1977) 0.02 
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  2. Høyrup, E.: Books about mathematics : history, philosophy, education, models, system theory, and works of reference etc (1979) 0.02 
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