Columbia subject headings:
Harvard subject headings:
Germany--Commerce--History--18th century.
Germany--Commerce--Scotland.
Scotland--Commerce--Germany.
Scotland--Commerce--History--18th century.
Princeton subject headings:
Germany--Commerce--Scotland--Statistics.
Harbors--Economic aspects--Germany--History--18th century--Statistics.
North Atlantic Ocean--Commerce--History--18th century--Statistics.
North Atlantic Ocean--Economic aspects--History--18th century--Statistics.
Scotland--Commerce--Germany--Statistics.
Statistics.