- Grosvenor, Gilbert Hovey, 1875-1966.1
- Haiti. Armée.1
- Hotel Astor (New York, N.Y.)1
- Hurley, Edward N. (Edward Nash), 1864-1933.1
- Industrial safety.1
- Ingalls, David S. (David Sinton), 1899-1985.1
- Italy. Marina.1
- Jahncke, Ernest L. (Ernest Lee), 1877-1960.1
- Japan. Kaigun.1
- Katō, Hiroharu, 1870-1939.1
- Knights of Columbus.1
- Knots and splices.1
- La Guardia, Fiorello H. (Fiorello Henry), 1882-1947.1
- Laleau, Léon, 1892-1
- Law and ethics--United States.1
- Lexington (Aircraft carrier : 1927-1942)1
- Lexington (Aircraft carrier : 1943-1991)1
- Lighting--Special effects.1
- Lightning.1
- Locks (Hydraulic engineering)1