- International relations.✖[remove]3
- Aeronautics.1
- Air pilots.1
- Ambassadors.1
- Calles, Plutarco Elias, 1877-1945.1
- Lindbergh, Charles A. (Charles Augustus), 1902-1974.1
- Mexico--Relations--United States.1
- Morrow, Dwight W. (Dwight Whitney), 1873-1931.1
- Payne, John Barton, 1855-1935.1
- Robleto, Hernán, 1895-1