All Authors
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- Douglas, Norman 1868-1952 3040 downloads
- Rutherford, Ernest 1871-1937 3040 downloads
- Shea, Robert 1933-1994 3040 downloads
- Henderson, W. J. (William James) 1855-1937 3039 downloads
- Taber, Harry Persons 1865-1951 3039 downloads
- Pritchett, R. T. (Robert Taylor) 1828-1907 3038 downloads
- Langdon, Stephen 1876-1937 3037 downloads
- Heuser, Herman J. (Herman Joseph) 1851-1933 3037 downloads
- Bisland, Elizabeth 1861-1929 3031 downloads
- MacKaye, Steele, Mrs. 1845-1924 3028 downloads
- Gosse, Philip Henry 1810-1888 3028 downloads
- Silvanto, Reino 1883-1943 3027 downloads
- Philippoteaux, Paul 1846-1923 3027 downloads
- Velloso, José Mariano da Conceição 1742-1811 3026 downloads
- Myers, Ernest 1844-1921 3025 downloads
- Waggaman, Mary T. (Mary Theresa) 1846-1931 3023 downloads
- Bird, Frederic Mayer 1838-1908 3023 downloads
- Claudel, Paul 1868-1955 3023 downloads
- Harker, L. Allen (Lizzie Allen) 1863-1933 3022 downloads
- Sclater, Philip Lutley 1829-1913 3022 downloads
- Williams, Blanche Colton 1879-1944 3020 downloads
- Astronomical Society of the Pacific - 3019 downloads
- Ingels, Graham 1915-1991 3019 downloads
- Fox, Gardner F. (Gardner Francis) 1911-1986 3017 downloads
- Grotius, Hugo 1583-1645 3017 downloads