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Author/Creator
- M'Gonigle, John W.2
- MacLeod, Norman S.2
- Macdonald, Gordon A. (Gordon Andrew), 1911-19781
- Maine Geological Survey2
- Maldonado, Florian1
- Manitoba. Department of Energy and Mines1
- Marchand, Denis E.1
- Massachusetts. Department of Public Works1
- Maughan, Edwin K., 1926-19951
- McCollough, W. Ferrell1
- McIntyre, David H.2
- McLellan, Marguerite W.1
- Metz, Jenny M.1
- Middendorf, Mark A.2
- Miller, Fred K.2
- Miller, Robert J.1
- Millgate, M. L.1
- Minasian, Diane L.1
- Minnesota Geological Survey4
- Minnesota. Division of Minerals1