Creator
- Lauber, Eduard1
- Laurie, A. P. (Arthur Pillans), 1861-19491
- Lavine, Irvin, 1902-1
- Lawless, Dorothy, 1906-19811
- Lea, M. Carey (Mathew Carey), 1823-18971
- Leary, James C.1
- Leeds, Albert Ripley, 1843-19021
- Lehne, Adolf, 1856-19301
- Leonard Peterson & Co.1
- Leopold Cassella & Co.1
- Literary Digest1
- Little & Son Printers1
- Lloyd, C. G. (Curtis Gates), 1859-19261
- Lloyd, John Uri, 1849-19361
- Lohman, Charles R.1
- Long, Howard1
- Longmans, Green, and Co.1
- Los Alamos Scientific Laboratory1
- Lothrop Publishing Company1
- Lovibond, Joseph W. (Joseph Williams), 1835-19181