- Leszynsky, W. M., author1
- Li, Amanda, author1
- Li, Yan, author1
- Libman, Kimberley, author1
- Long Island College Hospital.1
- Loring, Edward G. (Edward Greeley), 1837-1888, author1
- Lowell, Josephine Shaw, 1843-1905, author1
- LoĢpez, Ray, author1
- Lusk, William Thompson, 1838-18971
- Lusk, William Thompson, 1838-1897, author1
- Lyceum of Natural History (New York, N.Y.)1
- Lyceum of Natural History (New York, N.Y.). Library.1
- Maas, F. M., author1
- Mabry, Nicole, author1
- Mallon, Kevin, author1
- Manhattan Eye and Ear Hospital. Board of Directors, issuing body.1
- Mann, David R., author1
- Marquez, Ivan, author1
- Mathews, J. M. (James McFarlane), 1785-18701
- May, Charles Henry, 1861-1943, author1