Authors: R.
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- Carling, John R. - 2311 downloads
- Burden, E. R. - 2289 downloads
- Wollaston, A. F. R. (Alexander Frederick Richmond) 1875-1930 2280 downloads
- Wenckebach, L. W. R. (Ludwig Willem Reymert) 1860-1937 2271 downloads
- Calhoun, A. R. (Alfred Rochefort) 1844-1912 2263 downloads
- Gilbert, Robert E. 1924-1993 2244 downloads
- Davies, Randall 1866-1946 2243 downloads
- Haweis, H. R. (Hugh Reginald) 1839-1901 2238 downloads
- Kelson, Keith R. - 2234 downloads
- Riggs, Stephen Return 1812-1883 2219 downloads
- Henderson, G. F. R. (George Francis Robert) 1854-1903 2214 downloads
- Bourne, H. R. Fox (Henry Richard Fox) 1837-1909 2177 downloads
- Johnston, Richard Malcolm 1822-1898 2161 downloads
- Schaare, C. R. (Christian Richard) 1893-1980 2139 downloads
- Adams, James R. - 2137 downloads
- Trowbridge, W. R. H. (William Rutherford Hayes) 1866-1938 2128 downloads
- Plomer, Henry R. (Henry Robert) 1856-1928 2107 downloads
- Ramón y Cajal, Santiago 1852-1934 2092 downloads
- Cunningham, Robert Hays - 2059 downloads
- Preston, R. M. P. (Richard Martin Peter) 1884-1965 2058 downloads
- Major, Richard Henry 1818-1891 2021 downloads
- Perés, Ramón D. (Ramón Domingo) 1863-1956 2009 downloads
- Boak, Arthur E. R. (Arthur Edward Romilly) 1888-1962 1962 downloads
- Lakeland, R. - 1959 downloads
- Fraprie, Frank Roy 1874-1951 1950 downloads