LIBRIS (Library Information System) is a Swedish national union catalogue maintained by the National Library of Sweden in Stockholm. It is possible to freely search about 6.5 million titles nationwide. In addition to bibliographic records, one for each book or publication, LIBRIS also contains an authority file of people. For each person there is a record connecting name, birth and occupation with a unique identifier. The MARC Code for the Swedish Union Catalog is SE-LIBR, normalized: selibr.