Columbia subject headings:
Catholics--Poland--Wrocław--Social conditions.
Jews--Poland--Wrocław--Social conditions.
Protestants--Poland--Wrocław--Social conditions.
Wrocław (Poland)--Social conditions.
Harvard subject headings:
Catholics--Poland--Wrocław--Social conditions.
Jews--Poland--Wrocław--Social conditions.
Protestants--Poland--Wrocław--Social conditions.
Wrocław (Poland)--Ethnic relations.
Princeton subject headings:
Catholics--Poland--Wrocław--Social conditions.
Jews--Poland--Wrocław--Social conditions.
Protestants--Poland--Wrocław--Social conditions.
Wrocław (Poland)--Social conditions.