Columbia subject headings:
Harvard subject headings:
Mexico--Commerce--History--18th century--Congresses.
Mexico--Commerce--History.
Mexico--Commercial policy--History--18th century--Congresses.
Mexico--Economic conditions--18th century.
Mexico--Politics and government--1540-1810--Congresses.
Mexico--Politics and government--18th century.
Spain--Colonies--America--Commerce--History.
Princeton subject headings:
Mexico--Commerce--History--18th century--Congresses.
Mexico--Commercial policy--History--18th century--Congresses.
Mexico--Politics and government--1540-1810--Congresses.