Authors: Roberts (sorted by popularity)
- Long, R. E. C. (Robert Edward Crozier) 1872- 237 downloads
- Roberts, E. S. (Ernest Stewart) 1847-1912 235 downloads
- Bell, Robert 1800-1867 233 downloads
- Sterndale, Robert Armitage 1839-1902 233 downloads
- Leydenfrost, Robert J. 1925-1987 232 downloads
- Cotton, Robert Christie 1885-1952 232 downloads
- Ferguson, Robert -1898 227 downloads
- Anderson, Robert Gordon 1881- 227 downloads
- Straus, Ralph 1882-1950 226 downloads
- Scott, Robert Falcon 1868-1912 223 downloads
- Flickinger, Robert Elliott 1846- 223 downloads
- Murray, R. F. (Robert Fuller) 1863-1894 223 downloads
- Jennings, Robert 1824-1893 222 downloads
- Day, Robert Adams 1924- 218 downloads
- Ford, Robert 1846-1905 218 downloads
- Lowndes, Robert W. 1916-1998 216 downloads
- Harrison, Robert 1820-1897 215 downloads
- Watson, Robert 1882-1948 211 downloads
- Fowler, Robert 1853-1926 211 downloads
- Ritchie, Robert Welles 1879-1942 210 downloads
- Heizer, Robert F. (Robert Fleming) 1915-1979 210 downloads
- Dabney, Robert Lewis 1820-1898 209 downloads
- Mellin, Robert 1826-1880 208 downloads
- Williamson, Robert Wood 1856-1932 207 downloads
- Hutchinson, J. R. (John Robert) 1858-1921 206 downloads