Bibliographic records from NUKAT are uploaded into the largest international union catalog – WorldCat worldcat.org, where they can be retrieved by end-users from the whole world and downloaded by foreign libraries.
COPYRIGHT POLSKA Authors and Publishers Association
NUKAT Center provides the Association with information on the minimal number of copies of foreign books, printed music and cartographic documents in NUKAT member library collections - these data help the Association to pay appropriate repartitions to foreign publishers, i.e. fees for free circulation of their titles by Polish libraries).
Virtual International Authority File
NUKAT Center uploads authority records from NUKAT into VIAF Virtual International Authority File. VIAF helps catalogers from the whole world to find variants of names used in bibliographic records in different countries and refer to appropriate national authority files available online where they can download useful data.