NALIS Union Catalogue is the national catalogue of libraries in Bulgaria. It enables all the users:

• To simultaneously search the integrated library catalogues, digital collections and periodicals of the free access to the bibliographic data of over 3,500,000 items - books, periodicals, maps, graphics, digital copies etc. - integrated into the NALIS Union Catalogue.
• To quickly and easily find out in what libraries to find the book they need.
• To have free access to the digitised copies of the 19th-century Bulgarian books and periodicals in the holdings of CL-BAS and SU.

Every institution contributing digital content to the NALIS project is responsible to respect the copyrights related to the online publication of this content in the NALIS Union Catalogue