Creator
- Luckiesh, Matthew, 1883-19671
- Lyell, Charles, Sir, 1797-18751
- Lyman, Henry M. (Henry Munson), 1835-19041
- Macalister, Alexander1
- Macilwain, George, 1797-18821
- Mackellar, Smiths & Jordan Co.1
- Macmillan Company1
- Macmillan Company of Canada1
- Maire, F. (Frederick)1
- Mallis, Arnold1
- Manufacturing Chemists' Association (U.S.)1
- Marpmann, Georg Friedrich Adolf, 1849-19111
- Martin, L. C. (Louis Claude)1
- Martyn, Lily1
- Massachusetts Publishing Company1
- Mauriceau, A. M.1
- Maxim, Hudson, 1853-19271
- Maxwell, A. Kirkpatrick1
- Mayer, Jean, 1920-19931
- McDougall-Butler Co.1