Columbia subject headings:
Mexico--Emigration and immigration--History--18th century.
Mexico--Population--History--18th century.
Migration, Internal--Mexico--History--18th century.
Harvard subject headings:
Mexico--Emigration and immigration--History--18th century.
Mexico--Population--History--18th century.
Migration, Internal--Mexico--History--18th century.
Princeton subject headings:
Mexico--Population--History--18th century.
Migration, Internal--Mexico--History--18th century.