- Köhl, Hermann, 1888-1938.2
- La Follette, Robert M. (Robert Marion), 1895-1953.2
- La Guardia, Fiorello H. (Fiorello Henry), 1882-1947.2
- Letters.2
- License system.2
- Lincoln Memorial (Washington, D.C.)--Aerial film and video footage.2
- Lincoln, Abraham, 1809-1865.2
- Lindbergh, Evangeline Lodge Land.2
- Liquors.2
- Literacy.2
- Lobbyists--United States.2
- Lodge, Henry Cabot, 1850-1924.2
- Longworth, Alice Roosevelt, 1884-1980.2
- MacDonald, James Ramsay, 1866-1937.2
- Machado y Morales, Gerardo, 1871-1939.2
- Mail.2
- Manners and customs--United States.2
- Marching bands.2
- Markets.2
- Martin airplanes.2