Creator
- MacGowan-Cooke Printing Co. (Chattanooga, Tenn.)1
- Mack Photo Co.1
- Magill, Zeph F.1
- Maguire (Urbana, Ill.)1
- Manning Solou Studio.1
- Mark, M.1
- Marken & Bielfeld, Inc. (Frederick, Md.)1
- Marshall's Studio.1
- Marshall, Jim, 1936-2010.1
- Mary Morley & Son.1
- Mathias, Ted.1
- Maurice (Chicago)1
- Maxwell.1
- Mayer.1
- McAdams, David.1
- McGabe.1
- McGarry's Studio (Asheville, N.C.)1
- McGregor Studio.1
- McKee Studios (Pittsburgh, Pa.)1
- McLauchlan, J.1