Columbia subject headings:
Germans--Silesia, Upper (Poland and Czech Republic)--History.
Polish people--Silesia, Upper (Poland and Czech Republic)--History.
Silesia, Upper (Poland and Czech Republic)--Ethnic relations.
Harvard subject headings:
Princeton subject headings:
Germans--Silesia, Upper (Poland and Czech Republic)--History.
Polish people--Silesia, Upper (Poland and Czech Republic)--History.
Silesia, Upper (Poland and Czech Republic)--Ethnic relations.