- Lotter, Tobias Conrad, 1717-17772
- Lucini, Antonio Francesco, 1605-2
- Lusardi, B.A2
- Lyne, James2
- Macomber, R. Z.2
- McSwiggen, Peter L.2
- Meints, Joyce P.2
- Michigan. Land Economic Survey2
- Michler, N. (Nathaniel), 1827-18812
- Minn Saint Louis County Highway Dept.2
- Minnesota Forest Service2
- Minnesota. Division of Waters2
- Minnesota. State Drainage Commission.2
- Mitchell, John, 1711-17682
- Mogg, Edward2
- Morden, Robert, -17032
- Mossler, J.H2
- Mulford, John C.2
- National Cartographic Center (U.S.)2
- Nelson, Willis H. (Willis Howard), 1920-20102