Columbia subject headings:
Andalusia (Spain)--Commerce--History--18th century.
Andalusia (Spain)--Commerce--History--19th century.
Roads--Spain--Andalusia--History--18th century.
Roads--Spain--Andalusia--History--19th century.
Harvard subject headings:
Andalusia (Spain)--Commerce--History--18th century.
Andalusia (Spain)--Commerce--History--19th century.
Roads--Spain--Andalusia--History--18th century.
Roads--Spain--Andalusia--History--19th century.
Princeton subject headings:
Andalusia (Spain)--Commerce--History--18th century.
Roads--Spain--Andalusia--History--18th century.