Columbia subject headings:
Archivo General de Simancas--Catalogs.
Belgium--History--Manuscripts--Sources--Catalogs.
Belgium--History--Sources--Bibliography--Catalogs.
Belgium--History--Sources.
Harvard subject headings:
Archivo General de Simancas--Catalogs.
Belgium--History--Manuscripts--Sources--Catalogs.
Belgium--History--Sources--Bibliography--Catalogs.
Belgium--History--Sources.
Princeton subject headings:
Archivo General de Simancas--Catalogs.
Belgium--History--Manuscripts--Sources--Catalogs.
Belgium--History--Sources--Bibliography--Catalogs.
Belgium--History--Sources.
Catalogs.