Columbia subject headings:
Polish language--Dialects--Silesia, Upper (Poland and Czech Republic)
Polish language--Idioms.
Polish language--Political aspects--Silesia, Upper (Poland and Czech Republic)
Polish language--Social aspects--Silesia, Upper (Poland and Czech Republic)
Harvard subject headings:
Languages in contact--Silesia, Upper (Poland and Czech Republic)
Polish language--Dialects--Silesia, Upper (Poland and Czech Republic)
Polish language--Silesia, Upper (Poland and Czech Republic)--Idioms.
Silesians--Ethnic identity.
Princeton subject headings:
Polish language--Dialects--Silesia, Upper (Poland and Czech Republic).
Polish language--Idioms.
Polish language--Political aspects--Silesia, Upper (Poland and Czech Republic).
Polish language--Social aspects--Silesia, Upper (Poland and Czech Republic).