Columbia subject headings:
Harvard subject headings:
Burgos (Spain)--Commerce--History--Congresses.
Burgos (Spain). Consulado--Congresses.
Spain--Commerce--History--Congresses.
Princeton subject headings:
Burgos (Spain)--Commerce--History--Congresses.
Burgos (Spain)--History--Congresses.
Burgos (Spain). Consulado--History--Congresses.