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   title       = {UB Kassel: PUMA Akademisches Publikationsmanagement}, 
   url         = {http://www.ub.uni-kassel.de/puma.html},
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@electronic{is.uni-sb.de,
   title       = {ViBI-Suche « Institutsbibliothek « Fachrichtung Informationswissenschaft Saarbrücken}, 
   url         = {http://is.uni-sb.de/vibi/suchen.html},
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@electronic{www.ubka.uni-karlsruhe.de,
   title       = {BibTip}, 
   url         = {http://www.ubka.uni-karlsruhe.de/bibtip/},
   biburl      = {https://puma.uni-kassel.de/url/10894ac451a31b3544ab3ba12ac246b6/hotho},
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