Columbia subject headings:
Harvard subject headings:
Poland--History, Military--1795-1918
Poland. Legiony Polskie.
World War, 1914-1918--Campaigns--Eastern Front
World War, 1914-1918--Poland
Princeton subject headings:
Poland. Legiony Polskie--History.
World War, 1914-1918--Campaigns--Europe, Eastern.
World War, 1914-1918--Poland.