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- Keyl, Friedrich Wilhelm 1823-1871 3617 downloads
- United States. National Aeronautics and Space Administration - 3614 downloads
- Twidle, Arthur 1865-1936 3613 downloads
- Watling, Roy 1938- 3612 downloads
- Moore, G. E. (George Edward) 1873-1958 3612 downloads
- Bourne, Randolph Silliman 1886-1918 3612 downloads
- Clare, Lilian A. (Lilian Ada) 1865- 3610 downloads
- Laurence, Richard 1760-1838 3610 downloads
- Dargan, Olive Tilford 1869-1968 3610 downloads
- Blaikie, William Garden 1820-1899 3608 downloads
- Adams, John G. (John Greenleaf) 1810-1887 3608 downloads
- Gerbault, Henry 1863-1930 3608 downloads
- Houdetot, Elisabeth Galos, comtesse de 1841-1925 3608 downloads
- Pohle, Joseph 1852-1922 3606 downloads
- Preuss, Arthur 1871-1934 3606 downloads
- Chambers, Wilson V. (Wilson Vaughn) 1893-1980 3604 downloads
- Kelly, Florence Finch 1858-1939 3603 downloads
- Dircks, Sara Hay Goddard 1865-1942 3602 downloads
- Ostrander, Isabel 1883-1924 3602 downloads
- Hill, Janet McKenzie 1852-1933 3601 downloads
- Waterloo, Stanley 1846-1913 3600 downloads
- Lynch, Lawrence L. - 3600 downloads
- Balmer, Edwin 1883-1959 3599 downloads
- Fea, Allan 1860-1956 3596 downloads
- Lamon, Ward Hill 1828-1893 3595 downloads