Columbia subject headings:
Minorities.
Silesia--History.
World War, 1914-1918--Territorial questions--Silesia, Upper (Poland and Czech Republic)
Harvard subject headings:
Citizenship--Silesia, Upper (Poland and Czech Republic)--History.
Minorities--Legal status, laws, etc.--Silesia, Upper (Poland and Czech Republic)--History.
Silesia, Upper (Poland and Czech Republic)--History--Partition, 1919-1922.
World War, 1914-1918--Territorial questions--Silesia, Upper (Poland and Czech Republic)
Princeton subject headings: