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  • × classification_ss:"025.3 / dc20"
  1. Bellardo, T.: Subject indexing : an introductory guide (1991) 8.52 
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  2. Cleveland, D.B.; Cleveland, A.D.: Introduction to abstracting and indexing (2001) 8.52 
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  3. Cleveland, D.B.; Cleveland, A.D.: Introduction to abstracting and indexing (1990) 8.52 
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