Columbia subject headings:
Cities and towns, Medieval--Taxation--Poland.
Land tenure--Poland--History.
Pledges (Law)--Poland--History.
Poland--History--To 1572.
Harvard subject headings:
Cities and towns, Medieval--Taxation--Poland.
Land tenure--Poland--History.
Pledges (Law)--Poland--History.
Poland--History--To 1572--Sources.
Princeton subject headings:
Cities and towns, Medieval--Poland--Taxation.
Land tenure--Poland--History.
Pledges (Law)--Poland--History.
Poland--History--To 1572.