Authors: Ro
- McGregor, Ronald L. -
- McGuinn, Roger 1942-
- McIntyre, Robert 1851-1914
- McKay, R. H. (Robert Henderson) 1842-1926
- McKenzie, Roderick Duncan 1885-1940
- McKown, Robin -
- McNeill, Ronald 1861-1934
- McQuilkin, Robert Crawford 1886-1952
- McQuoid, Thomas Robert 1820-1912
- McReynolds, Robert 1854-1928
- Mead, G. R. S. (George Robert Stow) 1863-1933
- Megrue, Roi Cooper 1883-1927
- Mellin, Robert 1826-1880
- Mendel, Rosalie G. -
- Mengel, Robert Morrow 1921-
- Merliss, Reuben (Reuben Robert) 1915-1987
- Merriman, Roger Bigelow 1876-1945
- Merry, Robert 1755-1798
- Merz, Robert L. -
- Mesa y Rosales, Enrique de 1879-1929
- Meyer, Robert B. -
- Mikels, Rosa Mary Redding 1862-
- Millar, H. R. (Harold Robert) 1869-1942
- Miller, Ellen 1854-1929
- Miller, Mary Rogers 1868-
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