Columbia subject headings:
United States--Foreign relations--1913-1921.
Wilson, Woodrow, 1856-1924.
World War, 1914-1918--United States.
Harvard subject headings:
United States--Foreign relations--1913-1921.
Wilson, Woodrow, 1856-1924.
World War, 1914-1918--United States
Princeton subject headings:
United States--Foreign relations--1913-1921.
Wilson, Woodrow, 1856-1924.
World War, 1914-1918--United States.