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- Medical Association of the District of Columbia, author.1
- Medical Society of the County of Erie (N.Y.). Committee on Legislation.1
- Meigs, J. Forsyth (John Forsyth), 1818-18821
- Mello, Carlos Augusto de.1
- Mello, José W. Cabral de (José Wellington Cabral)1
- Melville, Francis C., author1
- Mendelson, Walter, 1857-1940, author1
- Menezes, José Telles Barreto de.1
- Merrell, Albert, author1
- Meyer, Georg Hermann von, 1815-1892, author1
- Michigan. State Board of Health, author.1
- Mills, Charles K. (Charles Karsner), 1845-1931, author1
- Missouri State Dental Association, author.1
- Mitchell, Howard E., author1
- Mitchell, S. Weir (Silas Weir), 1829-19141
- Mitchell, S. Weir (Silas Weir), 1829-1914 author1
- Molina, Everado, author1
- Monteiro, Jozé Francisco.1
- Montenegro, M. V., author1