Columbia subject headings:
Bibliothèque royale de Belgique--Catalogs.
Manuscripts, Medieval--Catalogs.
Manuscripts--Belgium--Brussels--Catalogs.
Watermarks--Catalogs.
Harvard subject headings:
Bibliothèque royale de Belgique--Catalogs.
Manuscripts, Medieval--Catalogs.
Manuscripts--Belgium--Brussels--Catalogs.
Watermarks--Catalogs.
Princeton subject headings:
Bibliothèque royale Albert Ier--Catalogs.
Catalogs.
Manuscripts--Belgium--Brussels--Catalogs.
Manuscripts--History--15th century--Catalogs.
Watermarks--Catalogs.
Watermarks--History--15th century--Catalogs.