Columbia subject headings:
Hoover, Herbert, 1874-1964.
Presidents--United States--Biography.
United States--Foreign relations--1913-1921.
Wilson, Woodrow, 1856-1924.
World War, 1914-1918--Peace.
Harvard subject headings:
Hoover, Herbert, 1874-1964.
Presidents--United States--Biography
United States--Foreign relations--1913-1921.
Wilson, Woodrow, 1856-1924.
World War, 1914-1918--Peace
Princeton subject headings:
Hoover, Herbert, 1874-1964.
Presidents--United States--Biography.
United States--Foreign relations--1913-1921.
Wilson, Woodrow, 1856-1924.
World War, 1914-1918--Peace.