Nederlandse Centrale Catalogus
The Nederlandse Centrale Catalogus (NCC) is the official Dutch bibliographic catalog and metadata index system that links to and consolidates the catalogs of over 400 libraries in the Netherlands. == Scope == The NCC contains bibliographic data and locations of more than 14 million books and 500,000 magazines operating in more than 400 Netherlands libraries are found.
Source: Wikipedia — Nederlandse Centrale Catalogus (CC BY-SA 4.0)