Columbia subject headings:
Poland--Boundaries--History--20th century.
Poland--History--Wars of 1918-1921--Territorial questions.
Russo-Polish War, 1919-1920--Territorial questions.
World War, 1914-1918--Territorial questions--Poland.
Harvard subject headings:
Poland--Boundaries--History--20th century.
Poland--History--Wars of 1918-1921--Territorial questions
Russo-Polish War, 1919-1920--Territorial questions.
World War, 1914-1918--Territorial questions--Poland
Princeton subject headings: