Columbia subject headings:
Harvard subject headings:
Floridablanca, José Moñino y Redondo, conde de, 1728-1808--Congresses.
Spain--Census, 1787--Congresses.
Spain--Population--History--18th century--Congresses.
Princeton subject headings:
Spain--Census, 1787--Congresses.
Spain--Population--History--17th century--Congresses.