- Longyear, John Munro, 1850-1922, compiler1
- Lyman, Benjamin Smith, 1835-19201
- Matthews-Northrup Company1
- Maull Co.1
- Mayo, Geo. U. (George U.)1
- McClelland, D.1
- Meisel, A. (Augustus)1
- Merrell, H. B. (Harvey B.), publisher1
- Michigan Central Railroad Company1
- Michigan Mutual Life Insurance Company.1
- Michigan Syndicate1
- Michigan. Department of Commissioner of Railroads1
- Milwaukee Lith. & Engr. Co.1
- Mitchell, S. Augustus (Samuel Augustus), 1792-1868, cartographer.1
- Morawski, P. S. http://id.loc.gov/authorities/names/n2008034777 http://viaf.org/viaf/19402001
- National Railway Publication Company1
- Nozaki, Sabun, 1858-19351
- O.W. Gray & Son1
- Ohman Map Co.1
- Oregon Railway and Navigation Company1