Columbia subject headings:
Harvard subject headings:
Argentina--Foreign relations--Europe.
Europe--Foreign relations--Argentina.
World War, 1914-1918--Argentina.
World War, 1914-1918--Brazil.
Princeton subject headings:
Argentina--Foreign relations--Europe.
Europe--Foreign relations--Argentina.
World War, 1914-1918--Argentina.
World War, 1914-1918--Brazil.