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  • × year_i:[1950 TO 1960}
  1. Roloff, H.: Fünfzig Jahre zentrale Auskunfterteilung (1955) 9.22 
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  2. Roloff, H.: Sechs Jahre Auskunftsabteilung der Öffentlichen Wissenschaftlichen Bibliothek Berlin : August 1945 bis August 1951 (1951) 9.22 
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