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- Bergman, Torbern 1735-1784 367 downloads
- Kane, Thomas L. (Thomas Leiper) 1822-1883 367 downloads
- Oehler, Gottlieb F. - 367 downloads
- Ketcham, Orman Wesley 1865-1950 366 downloads
- Brady, James - 366 downloads
- Kotouč, Otto 1885-1973 366 downloads
- Olmsted Brothers - 365 downloads
- Hardy, Osgood 1889-1955 365 downloads
- Ortman, Blanche Sellers 1870-1948 365 downloads
- Zur Linde, Otto 1873-1938 365 downloads
- Nagel, Oskar 1874- 365 downloads
- Williams, Clinton - 364 downloads
- Mayer, Otto - 364 downloads
- Ogilvie, William 1688-1729 364 downloads
- Howd, Otis T. - 364 downloads
- Glaubrecht, O. (Otto) 1807-1859 363 downloads
- Grosskopf, O. G. P. (Otto Gottlob Paul) 1891-1960 362 downloads
- O'Hara, David 1878-1959 362 downloads
- Osselen-van Delden, B. E. van (Bertha Elisabeth) 1847-1936 361 downloads
- Oliveira, João Duarte - 361 downloads
- Boyle, Roger, Earl of Orrery 1621-1679 360 downloads
- Dupré-Carra, Léon 1843-1920 360 downloads
- Schoetensack, Otto 1850-1912 360 downloads
- Enking, Ottomar 1867-1937 359 downloads
- Schürer, Oskar 1892-1949 358 downloads