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  1. Oct 2023
  2. webdoc.sub.gwdg.de webdoc.sub.gwdg.de
    Implementing Persistent Identifiers. Overview of concepts, guidelines and recommendations
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    1. kael 16 Oct 2023
      id urn nbn hdl doi ark purl openurl wikipedia:en=Persistent_identifier
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    webdoc.sub.gwdg.de/edoc/ah/2006/hilse_kothe/urn:nbn:de:gbv:7-isbn-90-6984-508-3-8.pdf