Authors: R.
- Birt, C. R. - 670 downloads
- Peiper, C. R. S. (Carl Rudolph Samuel) 1798-1879 667 downloads
- Taylor, R. W. 1876-1914 666 downloads
- Coppinger, R. W. (Richard William) 1847-1910 662 downloads
- Kjellén, Rudolf 1864-1922 657 downloads
- León, Juan R. - 657 downloads
- Hall, R. N. (Richard Nicklin) 1853-1914 654 downloads
- Goulding, F. R. (Francis Robert) 1810-1881 654 downloads
- Bertram, Robert Aitkin 1836-1886 654 downloads
- Montalba, Anthony R. (Anthony Reubens) - 651 downloads
- Hoernlé, Reinhold Friedrich Alfred 1880-1943 650 downloads
- Gronow, R. H. (Rees Howell) 1794-1865 650 downloads
- Adams, Clifford R. (Clifford Rose) 1902-1987 647 downloads
- Carpenter, George R. (George Rice) 1863-1909 646 downloads
- Cunningham, Robert Hays - 643 downloads
- Hodson, W. S. R. (William Stephen Raikes) 1821-1858 642 downloads
- Peterson, Steven R. - 640 downloads
- Johnston, R. E. - 639 downloads
- Cruttwell, C. R. M. F. (Charles Robert Mowbray Fraser) 1887-1941 638 downloads
- Buxton, Robert Hugh 1871-1965 636 downloads
- Cockerell, C. R. (Charles Robert) 1788-1863 634 downloads
- Austin, Robert 1895-1973 634 downloads
- Claridge, R. T. (Richard Tappin) 1799-1857 630 downloads
- Ward, B. R. (Bernard Rowland) 1863- 628 downloads
- Connolly, R. Hugh (Richard Hugh) 1873-1948 628 downloads
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