Authors: 1900
- Lindsay, Jack 1900-1990
- Lindsay, Robert Bruce 1900-1985
- Lowell, Joan 1900-1967
- MacDonald, Philip 1900-1980
- Macnab, P. (Peter) -1900
- Majors, Alexander 1814-1900
- Marques, César Augusto 1826-1900
- Marsy, Arthur de 1843-1900
- Martineau, James 1805-1900
- Martin, George 1822-1900
- Merryweather, F. Somner (Frederick Somner) 1827-1900
- Mivart, St. George Jackson 1827-1900
- Monleón y Torres, Rafael 1835-1900
- Mowry, Arthur May 1862-1900
- Müller, F. Max (Friedrich Max) 1823-1900
- Nicaise, Auguste 1828-1900
- Nietzsche, Friedrich Wilhelm 1844-1900
- Nobre, António Pereira 1867-1900
- Nordby, Conrad Hjalmar 1867-1900
- Oblinger, M. M. (Milo Milton) 1900-
- Ostenso, Martha 1900-1963
- Pajari, M. 1900-1972
- Pannemaker, François 1822-1900
- Payne-Gaposchkin, Cecilia 1900-1979
- Pearson, Emily C. (Emily Clemens) 1818-1900
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