Columbia subject headings:
Poznań (Poland : Voivodeship)
World War, 1914-1918--Territorial questions--Germany.
World War, 1914-1918--Territorial questions--Poland.
Harvard subject headings:
Poznań (Poland : Voivodeship)
World War, 1914-1918--Territorial questions--Germany
World War, 1914-1918--Territorial questions--Poland
Princeton subject headings: