Authors: Charles (sorted by popularity)
- Sargent, Charles Sprague 1841-1927 443 downloads
- Klein, Charles 1867-1915 440 downloads
- Biggs, Charlotte -1827 439 downloads
- Horton, Charles M. (Charles Marcus) 1879- 437 downloads
- L'Homond, C. F. 1727-1794 436 downloads
- Stevens, C. M. (Charles McClellan) 1861- 436 downloads
- Knapp, Charles 1868-1936 436 downloads
- Bernard, Charles de 1804-1850 434 downloads
- Smithers, Leonard C. (Leonard Charles) 1861-1907 434 downloads
- Adams, Charles Francis 1807-1886 433 downloads
- Cherbuliez, Victor 1829-1899 429 downloads
- Nordhoff, Charles 1830-1901 429 downloads
- Beck, Charles - 427 downloads
- Otis, Charles P. (Charles Pomeroy) 1840-1888 426 downloads
- Sindelar, Joseph C. (Joseph Charles) 1885- 425 downloads
- Ryle, J. C. (John Charles) 1816-1900 425 downloads
- Stopes, C. C. (Charlotte Carmichael) 1840-1929 420 downloads
- Meryon, Charles Lewis 1783-1877 420 downloads
- Adams, Charles Kendall 1835-1902 418 downloads
- Harding, Charlotte 1873-1951 416 downloads
- Scherzer, Karl, Ritter von 1821-1903 415 downloads
- Burkett, Charles William 1873-1962 415 downloads
- Haskins, Charles Homer 1870-1937 414 downloads
- Livet, Charles-Louis 1828-1897 413 downloads
- Karpinski, Louis Charles 1878-1956 412 downloads