Authors: O
- Harrison, Edith Ogden 1862-1955 Aug 2, 2019
- Widtsoe, Osborne J. P. 1877-1920 Jul 27, 2019
- Stoddard, William O. 1835-1925 Jul 17, 2019
- Oakley, H. W. - Jul 12, 2019
- Byrne, Donn 1889-1928 Jul 10, 2019
- Read, Opie Percival 1852-1939 Jun 29, 2019
- Adams, O. S. - Jun 15, 2019
- Ogilby, John 1600-1676 Jun 13, 2019
- Baker, Olaf - May 27, 2019
- Howard, L. O. (Leland Ossian) 1857-1950 May 19, 2019
- Odell, E. G. 1886-1929 May 16, 2019
- Laurent, d'Orléans, active 1279 - May 1, 2019
- O'Malley, Charles Donald - Apr 25, 2019
- Solbert, Oscar N. 1885-1958 Apr 20, 2019
- Öhrvall, Hjalmar 1851-1929 Apr 17, 2019
- Oppenheim, E. Phillips (Edward Phillips) 1866-1946 Apr 3, 2019
- Orcutt, Philip Dana - Mar 19, 2019
- Rayburn, Otto Ernest 1891-1960 Mar 19, 2019
- A British officer - Mar 18, 2019
- Lamplough, A. O. (Augustus O.) 1877-1930 Mar 17, 2019
- Guericke, Otto von 1602-1686 Mar 17, 2019
- Causey, James 1924-2003 Mar 1, 2019
- Öhrwall, Sophie - Feb 7, 2019
- Walzel, Oskar F. (Oskar Franz) 1864-1944 Feb 1, 2019
- Offutt, Andrew J. 1934-2013 Jan 28, 2019
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