- MacKenzie, H. S. (1)
- Magill, O. R. (6)
- Marsh, Leo B. (139)
- Martin, Calvin J. (1)
- Masterson, Harris, Jr. (1)
- McCloy, C. H. (11)
- McConnell, Thomas C. (9)
- McLachlin, L. E. (13)
- McMein, Neysa (1)
- McPherson Bros. (2)
- McPherson, J. L (6)
- McPherson, J. L and Rutledge, C. C. (1)
- McPherson, J. L. (16)
- Mead, Lawrence M. (2)
- Melton, Johnny (1)
- Menogyn YMCA Wilderness Adventures (1)
- Menogyn/YMCA Wilderness Adventures (2)
- Merritt, Rufus (1)
- Miles, Bertrand, 1928-2005. (1)
- Mills, W. P. (5)
