Columbia subject headings:
Appam (Steamship)
Arabic (Steamship)
Boy-Ed, K., 1872-1930.
Dumba, Konstantin, 1856-1947.
Joseph W. Fordney (Steamship)
Leelanaw (Steamship)
Neutrality.
Papen Franz von, 1879-
Sussex (Steamship)
William P. Frye (Ship)
World War, 1914-1918--Diplomatic history.
World War, 1914-1918--Economic aspects--United States.
Harvard subject headings:
Appam (Ship)
Arabic (Steamship : 1902-1915)
Arabic (Steamship)
Boy-Ed, K., 1872-1930.
Dumba, Konstantin Theodor, 1856-
Joseph W. Fordney (Steamship)
Leelanaw (Steamship)
Neutrality--United States.
Neutrality.
Papen, Franz von, 1879-1969.
Papen, Franz von.
Sussex (Steamship)
William P. Frye (Ship)
World War, 1914-1918--Diplomatic history
World War, 1914-1918--Economic aspects--United States
Princeton subject headings:
Appam (Ship)
Arabic (Steamship)
Boy-Ed, K., 1872-1930.
Dumba, Konstantin Theodor, 1856-
Joseph W. Fordney (Steamship)
Leelanaw (Steamship)
Neutrality--United States.
Neutrality.
Papen, Franz von.
Sussex (Steamship)
William P. Frye (Ship)
World War, 1914-1918--Diplomatic history.
World War, 1914-1918--Economic aspects--United States.