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- McCoy, Arthur G., artist1
- McMaster, William E.1
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- McMurtrie, Douglas C. (Douglas Crawford), 1888-1944, author1
- McParlin, T. A. (Thomas Andrew), 1825-18971
- Medico-Military Symposium for Medical Department Reserve Officers, Third Army Area (1949 : Augusta, Ga.), author.1
- Melnick, Daniel.1
- Merlis, Mark, author1
- Metcalfe, John T. (John Thomas), -19021
- Miller, John, 1915-1
- Mills, John.1
- Milstead, V. M., author1
- Molnar, G. W. (George W.), author1
- Munson, Edward Lyman, 1868-1947, author1
- Nagle, John T. (John Thomas), 1842-1919, author1
- National Research Council (U.S.). Subcommittee on Oxygen and Anoxia, author, issuing body.1
- Noyes, Isaac P., author1
- Ockenden, photographer1
- Ohio. State Board of Medical Examiners, author.1