Authors: R.
- Garbe, Richard 1857-1927 764 downloads
- Green, J. R. - 762 downloads
- Stratton, R. B. (Royal Byron) 1827-1875 759 downloads
- Mathews, R. H. (Robert Hamilton) 1841-1918 759 downloads
- Peter, Robert 1805-1894 757 downloads
- Glover, Richard 1712-1785 756 downloads
- Ray, John 1627-1705 756 downloads
- Thayer, Lee 1874-1973 756 downloads
- Cook, John R. 1844-1917 754 downloads
- Buckland, A. R. (Augustus Robert) 1857-1942 753 downloads
- Audibert, P. Raymond (Paul Raymond) 1858-1919 751 downloads
- Nettleship, Richard Lewis 1846-1892 748 downloads
- Howarth, O. J. R. (Osbert John Radcliffe) 1877-1954 745 downloads
- Morgan, F. R. - 741 downloads
- Lighton, William R. (William Rheem) 1866-1923 741 downloads
- Foster, Harold R. (Harold Rudolf) 1892-1982 740 downloads
- Traz, Robert de 1884-1951 736 downloads
- Clarke, Richard F. (Richard Frederick) 1839-1900 734 downloads
- Hawker, Robert Stephen -1875 731 downloads
- Swan, R. M. W. (Robert McNair Wilson) 1858-1904 730 downloads
- Breckinridge, Robert J. (Robert Jefferson) 1800-1871 729 downloads
- Armitage, Robert B. - 729 downloads
- Christman, Robert A. (Robert Adam) 1924-2012 725 downloads
- Stebbing, Thomas Roscoe Rede 1835-1926 722 downloads
- Hulbert, James R. (James Root) 1884-1969 722 downloads
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