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- Szemere, György 1863-1930 1852 downloads
- Lane, George Martin 1823-1897 1851 downloads
- Machen, J. Gresham (John Gresham) 1881-1937 1848 downloads
- Griggs, Sutton E. (Sutton Elbert) 1872-1933 1848 downloads
- Maugras, Gaston 1850-1927 1847 downloads
- Halsted, George Bruce 1853-1922 1847 downloads
- Harnack, Adolf von 1851-1930 1845 downloads
- Dickson, Gordon R. 1923-2001 1840 downloads
- Grimshaw, Beatrice 1871-1953 1833 downloads
- Brown, Goold 1791-1857 1829 downloads
- Evans, Dean - 1825 downloads
- Gatty, Alfred, Mrs. 1809-1873 1821 downloads
- Trevelyan, George Otto 1838-1928 1820 downloads
- Greever, Garland 1883-1967 1819 downloads
- Braun, Max 1850-1930 1816 downloads
- Newby, Gregory B. 1965-2025 1814 downloads
- Garner, John Leslie - 1811 downloads
- Greene, Nathaniel 1797-1877 1804 downloads
- Illinois State Geological Survey - 1803 downloads
- Grinnell, Joseph 1877-1939 1803 downloads
- Graves, George E. - 1799 downloads
- Greene, Robert -1592 1798 downloads
- English, George Bethune 1787-1828 1794 downloads
- Ervine, St. John G. (St. John Greer) 1883-1971 1792 downloads
- Kemp, E. G. (Emily Georgiana) 1860-1939 1790 downloads