Creator
- Listerud, W.H.1
- Lithy, Graham1
- Lowry, Thomas, 1843-19091
- Luo, Yuanyuan1
- Lusardi, Barbara, A1
- Maki, Geri L.1
- Marken, William J.1
- Marschner, Francis, 1882-19661
- Marshall County Land Co. (Warren, Minn.)1
- Martin, Christopher1
- Martin, Ralph (Delineator)1
- Mathez, E.A.1
- Matson, H. C.1
- Mattson, L. A. (Lewis Arthur), 1931-1
- McConnell, H. P.1
- McDonald, Molly1
- McGill-Warner Co1
- Meineke, David G.1
- Meints, Joyce1
- Melgaard, H. L.1