Librarians, archivists, and museum professionals are increasingly realizing the value of using and contributing information to Wikipedia through projects such as edit-a-thons and the 1Lib1Ref project. As the amount of knowledge in Wikipedia and Wikidata grows, the benefits to libraries in partnering with Wikimedia projects to enhance their own bibliographic records and catalog search results also increase. Conversely, librarians have created an immense number of bibliographic and authority records that Wikipedia and Wikidata editors can use both as resources in and of themselves and as examples of various approaches to metadata and knowledge creation. Despite some challenges there are numerous benefits for working to integrate library data ...