Columbia subject headings:
Germany--Antiquities, Roman.
Germany--Commerce--History.
Rome--Commerce--History.
Scandinavia--Antiquities, Roman.
Scandinavia--Commerce--History.
Harvard subject headings:
Germany--Antiquities, Roman.
Germany--Commerce--History.
Rome--Commerce--History.
Scandinavia--Antiquities, Roman.
Scandinavia--Commerce--History.
Princeton subject headings: