- Lawson, L. M. (Leonidas Merion), 1812-18646
- Leffmann, Henry, 1847-1930 author6
- Lend a Hand Society. Boston Floating Hospital, author.6
- Lieberman, Dara Alpert, author6
- Lin, Grace A., author6
- Little, William S., author6
- Lobstein, J. F. Daniel (Johann Friedrich Daniel), 1777-18406
- Long, Julia, (Of Urban Institute), author6
- Lundblad, Jennifer P., author6
- Mason, Lewis D. (Lewis Duncan), 1843- author6
- Massachusetts College of Pharmacy.6
- Massachusetts, enacting jurisdiction.6
- Mattson, M. (Morris), 1809?-18856
- McClellan, Ely, 1834-1893, author6
- McClintock, James, 1809-18816
- Mears, J. Ewing (James Ewing), 1838-1918, author6
- Michigan, enacting jurisdiction.6
- Moore, William Oliver, author6
- Moradi, Ashton, author6
- Morse, John Lovett, 1865-1940, author6