Columbia subject headings:
Early printed books--16th century.
St.-Nikolai-Bibliothek (Flensburg, Germany)--Catalogs.
Harvard subject headings:
St. Nikolai (Church : Flensburg, Germany). Bibliothek.
Princeton subject headings:
Early printed books--16th century.
St.-Nikolai-Bibliothek (Flensburg, Germany)--Catalogs.