Columbia subject headings:
Cities and towns, Medieval--Poland.
Poznań (Poland)--Social conditions.
Social classes--Poland--Poznań--History.
Urbanization--Poland--Poznań--History.
Harvard subject headings:
Princeton subject headings:
Cities and towns, Medieval--Poland.
Poznań (Poland)--Social conditions.
Social classes--Poland--Poznań--History.
Urbanization--Poland--Poznań--History.