Authors: O
- Edwards, Osman 1864-1936 1209 downloads
- Owen, Wilfred 1893-1918 1199 downloads
- Kallio, O. A. (Oskar Albin) 1874-1940 1191 downloads
- Oort, Jan van 1867-1938 1189 downloads
- Knapp, Oswald G. (Oswald Greenwaye) 1859- 1187 downloads
- O'Connor, William Douglas 1832-1889 1186 downloads
- Moore, Bloomfield H., Mrs. 1824-1899 1186 downloads
- O'Malley, Austin 1858-1932 1182 downloads
- Warter, John Wood 1806-1878 1179 downloads
- Cesare, Oscar Edward 1885-1948 1179 downloads
- Williams, Orlo 1883- 1176 downloads
- Orr, Charles Ebert 1861-1933 1175 downloads
- Tull, Ödön 1870-1911 1166 downloads
- Wakeman, Henry Offley 1852-1899 1165 downloads
- Thatcher, Oliver J. (Oliver Joseph) 1857-1937 1165 downloads
- Operti, Albert 1852-1927 1156 downloads
- Douglas, O. 1877-1948 1149 downloads
- Samarow, Gregor 1829-1903 1145 downloads
- O'Brien, Lucius Henry 1842-1913 1134 downloads
- Straus, Oscar S. (Oscar Solomon) 1850-1926 1133 downloads
- Micheaux, Oscar 1884-1951 1131 downloads
- Ohorn, Anton 1846-1924 1130 downloads
- Oberholtzer, Ellis Paxson 1868-1936 1126 downloads
- Olmsted, Frederick Law 1870-1957 1126 downloads
- Gilly, William O. S. - 1121 downloads
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