Authors: R. (sorted by popularity)
- Clifton, Grace R., Mrs. - 163 downloads
- Watling, Roy 1938- 163 downloads
- Rivers, W. H. R. (William Halse Rivers) 1864-1922 163 downloads
- Tenreiro, Ramón María 1879-1939 162 downloads
- Brinkerhoff, R. M. - 162 downloads
- Hoernlé, Reinhold Friedrich Alfred 1880-1943 162 downloads
- Bowker, R. R. (Richard Rogers) 1848-1933 161 downloads
- Brown, Charles Reynolds 1862-1950 161 downloads
- Garbe, Richard 1857-1927 159 downloads
- Park, Philip Ryder 1870- 159 downloads
- Ogilvie-Grant, W. R. (William Robert) 1863-1924 158 downloads
- Seymour, R. - 158 downloads
- Major, Richard Henry 1818-1891 158 downloads
- Hughes, William R. (William Richard) 1830-1899 157 downloads
- McAnally, D. R. (David Russell) 1847-1909 156 downloads
- Brookes, R. (Richard), active 1721-1763 - 155 downloads
- Seton-Watson, R. W. (Robert William) 1879-1951 154 downloads
- Woodward, George Ratcliffe 1848-1934 153 downloads
- Garner, R. L. (Richard Lynch) 1848-1920 153 downloads
- Villa Ramírez, Bernardo 1911- 153 downloads
- Cates, William L. R. (William Leist Readwin) 1821-1895 153 downloads
- Darling, Charles R. (Charles Robert) 1870- 153 downloads
- Schmidt, Walther R. - 152 downloads
- Braidwood, Robert J. (Robert John) 1907-2003 152 downloads
- León, Juan R. - 151 downloads