Columbia subject headings:
China--Discovery and exploration--Spanish--Sources.
China--History--18th century--Sources.
China--Relations--Spain--Sources.
Spain--Relations--China--Sources.
Harvard subject headings:
China--Discovery and exploration--Spanish--Sources.
China--History--18th century--Sources.
China--Relations--Spain--Sources.
Spain--Relations--China--Sources.
Princeton subject headings:
China--Discovery and exploration--Spanish--Sources.
China--History--18th century--Sources.
China--Relations--Spain--Sources.
Spain--Relations--China--Sources.