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  • × year_i:[1980 TO 1990}
  1. Wellisch, H.H.: Year's work in subject analysis : 1980 (1981) 8.61 
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  2. Wellisch, H.H.: ¬The literature of indexing (1989) 8.61 
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  3. Wellisch, H.H.: ¬The cybernetics of bibliographic control : toward a theory of document retrieval systems (1980) 8.61 
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  4. Wellisch, H.H.: Indexing and abstracting 1977-1981 : an international bibliography (1984) 8.61 
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  5. Wellisch, H.H.: ¬A new classification of the world's languages (1982) 8.61 
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  6. Wellisch, H.H.: ¬The case of the missing subtitle (1981) 8.61 
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