Columbia subject headings:
Silesia, Upper (Poland and Czech Republic)--History.
Silesia--History--20th century.
Harvard subject headings:
Polish people--Silesia
Silesia (Poland : Voivodeship)--History.
Silesia--History--Partition, 1919-1922.
Princeton subject headings:
Polish people--Silesia.
Silesia (Poland : Voivodeship)--History.
Silesia--History--Partition, 1919-1922.