- World peace.4
- Aeronautics--Competitions.3
- Albert I, King of the Belgians, 1875-1934.3
- Balloon racing.3
- Ballooning.3
- Boats and boating.3
- Cunard Line, ltd.3
- Gordon Bennett Cup Race.3
- Great Britain--Relations--United States.3
- Herrick, Myron T. (Myron Timothy), 1854-1929.3
- Hoover, Herbert, 1874-1964.3
- Johnson, Hiram, 1866-1945.3
- MacDonald, James Ramsay, 1866-1937.3
- Manners and customs--United States.3
- Military art and science.3
- Military ceremonies, honors, and salutes.3
- Mussolini, Benito, 1883-1945.3
- Peace.3
- Prajadhipok, King of Siam, 1893-1941.3
- Ramphaiphannī, Queen, consort of Prajadhipok, King of Siam, 1904-1984.3