Columbia subject headings:
Guards troops--Spain--History.
Spain--History, Military.
Spain. Ejército--History.
Spain. Guardia Real--History.
Harvard subject headings:
Guards troops--Spain--History.
Spain--History, Military.
Spain--History--House of Austria, 1516-1700.
Spain. Ejército--History.
Spain. Guardia Real--History.
Princeton subject headings: