Columbia subject headings:
Harvard subject headings:
Austria--Social conditions--20th century--Congresses.
World War, 1914-1918--Social aspects--Austria--Congresses.
Princeton subject headings:
Austria--History--20th century--Congresses.
Lower Austria (Austria)--History--20th century--Congresses.
World War, 1914-1918--Austria--Congresses.
World War, 1914-1918--Austria--Lower Austria--Congresses.