Columbia subject headings:
Harvard subject headings:
Cities and towns--Germany--History--Sources.
Cities and towns--Switzerland--History--Sources.
Germany--History--1273-1517--Sources.
Landfriede--History--Sources.
Rhine Cities, League of, 1254--Sources.
Princeton subject headings:
Cities and towns--Germany--History--Sources.
Cities and towns--Switzerland--History--Sources.
Germany--History--1273-1517--Sources.
Landfriede--History--Sources.
Rhine Cities, League of, 1254--Sources.