Columbia subject headings:
Cities and towns, Medieval--Germany, Southern.
Cities and towns, Medieval--Switzerland.
Messengers--Germany, Southern--History.
Messengers--Switzerland--History.
Harvard subject headings:
Business communication--Europe--History--To 1500.
Messengers--Germany--Baden-Württemberg--History--To 1500.
Messengers--Germany--Bavaria--History--To 1500.
Messengers--Switzerland--History--To 1500.
Postal service--Germany--Baden-Württemberg--History--To 1500.
Postal service--Germany--Bavaria--History--To 1500.
Postal service--Switzerland--History--To 1500.
Princeton subject headings: