Columbia subject headings:
Harvard subject headings:
Lower Austria (Austria)--History--20th century--Sources--Exhibitions.
World War, 1914-1918--Austria--Lower Austria--Archival resources--Exhibitions.
World War, 1914-1918--Austria--Lower Austria--Exhibitions.
Princeton subject headings:
Lower Austria (Austria)--History--20th century--Sources--Exhibitions.
World War, 1914-1918--Austria--Lower Austria--Archival resources--Exhibitions.
World War, 1914-1918--Austria--Lower Austria--Exhibitions.