Columbia subject headings:
Harvard subject headings:
Europe, Eastern--History, Military--20th century--Exhibitions.
Europe, Eastern--Strategic aspects--History--20th century--Exhibitions.
World War, 1914-1918--Europe, Eastern--Exhibitions.
Princeton subject headings:
Europe, Eastern--History, Military--20th century--Exhibitions.
Europe, Eastern--History--1918-1945--Exhibitions.
Europe, Eastern--Strategic aspects--History--20th century--Exhibitions.