Columbia subject headings:
Harvard subject headings:
Silesia, Upper (Poland and Czech Republic)--Ethnic relations.
Silesians--Ethnic identity.
Princeton subject headings:
Group identity--Poland--Opole (Voivodeship)
Group identity--Silesia, Upper (Poland and Czech Republic)
Opole (Poland : Voivodeship)--Ethnic relations.
Regionalism--Poland--Opole (Voivodeship).
Regionalism--Silesia, Upper (Poland and Czech Republic).
Silesia, Upper (Poland and Czech Republic)--History.