Subject
- Leviathan (Steamship)1
- Lexington (Aircraft carrier : 1927-1942)1
- Lexington Class (Aircraft carriers)1
- Lie detectors and detection.1
- Lighthouses.1
- Lincoln Memorial (Washington, D.C.)1
- Lindbergh, Anne Morrow, 1906-2001.1
- Lindbergh, Charles A. (Charles Augustus), 1902-1974.3
- Lindbergh, Charles Augustus, 1930-1932.1
- Lipreading.1
- Liquor laws.1
- Livestock.1
- Lockheed aircraft.1
- Locomotion (Steam locomotive)1
- Locomotives--Models--History.1
- Locomotives.2
- Love-letters.1
- Lowden, Frank O. (Frank Orren), 1861-1943.1
- Lumber.1
- Lumbering.2