Authors: Ro
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- Allbut, Robert 1832-1915 682 downloads
- Wild, Frank 1874-1939 681 downloads
- Goulding, F. R. (Francis Robert) 1810-1881 678 downloads
- Gustavson, Lealand 1899-1966 678 downloads
- Rollinson, Sunderland 1872-1950 676 downloads
- Finley, Robert B. - 675 downloads
- Robinson, Bertram 1870-1907 674 downloads
- Lehmann, Rosamond 1901-1990 673 downloads
- Roussel, Raymond 1877-1933 673 downloads
- Roloff, Alfred Gustav Christian 1879-1951 670 downloads
- Scott, Robert - 670 downloads
- Lynch, John Roy 1847-1939 669 downloads
- Stevenson, Robert 1772-1850 666 downloads
- Cotten, Sallie Southall 1846-1929 666 downloads
- Lansing, Robert 1864-1928 666 downloads
- Rothamsted Experimental Station - 664 downloads
- Fletcher, Robert Huntington 1875-1919 662 downloads
- Rowlands, Walter 1855- 662 downloads
- Ross, E. Denison (Edward Denison), Sir 1871-1940 662 downloads
- Rowlands, Samuel - 661 downloads
- Roddick, Amy Redpath 1868-1954 661 downloads
- Cockerell, C. R. (Charles Robert) 1788-1863 661 downloads
- Craig, Robert Alexander 1872-1939 658 downloads
- Noel, Roden 1834-1894 658 downloads
- Culverwell, Robert James 1802-1852 658 downloads