Authors: O
- Weininger, Otto 1880-1903 Apr 1, 2020
- Oelschlager, Charlotte 1898-1984 Mar 29, 2020
- United States. Office of Education - Mar 18, 2020
- Otis, Sarah Elizabeth Birdsall 1872-1940 Mar 14, 2020
- Ortt, Felix 1866-1959 Mar 8, 2020
- Oliver, Jean - Mar 7, 2020
- Owen, Helen Mildred 1894-1946 Mar 6, 2020
- United States. Forest Service. Rocky Mountain Region - Mar 4, 2020
- Association of Official Agricultural Chemists (U.S.) - Feb 20, 2020
- Murie, Olaus J. (Olaus Johan) 1889-1963 Feb 17, 2020
- Ott, Charles J. - Feb 17, 2020
- Osborn, T. Forbes - Feb 14, 2020
- Olson, Virgil J. - Feb 14, 2020
- Saint-Gelais, Octavien de 1468-1502 Feb 11, 2020
- Sitwell, Osbert 1892-1969 Feb 11, 2020
- Othegraven, Reinhold Pfahler von - Feb 9, 2020
- Somerville, E. Oe. (Edith Oenone) 1858-1949 Feb 7, 2020
- Salimbene, da Parma 1221-1287 Feb 2, 2020
- Oppenheim, Max, Freiherr von 1860-1946 Feb 2, 2020
- Rothert, Otto A. 1871-1956 Jan 29, 2020
- Uzanne, Octave 1851-1931 Jan 25, 2020
- O'Shea, Kitty 1845-1921 Jan 9, 2020
- Order of the Eastern Star. General Grand Chapter - Jan 8, 2020
- Mattsson, Gustaf 1873-1914 Jan 1, 2020
- Trinity College (Dublin, Ireland) - Jan 1, 2020
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