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  • × year_i:[1980 TO 1990}
  • × author_ss:"Hjerppe, R."
  1. Hjerppe, R.: ¬An outline of bibliometrics and citation analysis (1980) 0.03 
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  2. Hjerppe, R.: Hypercat at LIBLAB in Sweden : a progress report (1989) 0.02 
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  3. Hjerppe, R.: Hypercatalog and three meta-schemata for database views : knowledge organising, collection derived and user established structures (1986) 0.01 
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