Authors: R.
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- Stacy, John R. - 2266 downloads
- Wollaston, A. F. R. (Alexander Frederick Richmond) 1875-1930 2213 downloads
- Spofford, Ainsworth Rand 1825-1908 2212 downloads
- Riggs, Stephen Return 1812-1883 2204 downloads
- Wenckebach, L. W. R. (Ludwig Willem Reymert) 1860-1937 2199 downloads
- Bourne, H. R. Fox (Henry Richard Fox) 1837-1909 2188 downloads
- Henderson, G. F. R. (George Francis Robert) 1854-1903 2186 downloads
- Carling, John R. - 2170 downloads
- Davies, Randall 1866-1946 2159 downloads
- Kelson, Keith R. - 2136 downloads
- Schaare, C. R. (Christian Richard) 1893-1980 2130 downloads
- Gilbert, Robert E. 1924-1993 2118 downloads
- Calhoun, A. R. (Alfred Rochefort) 1844-1912 2114 downloads
- Trowbridge, W. R. H. (William Rutherford Hayes) 1866-1938 2083 downloads
- Preston, R. M. P. (Richard Martin Peter) 1884-1965 2077 downloads
- Johnston, Richard Malcolm 1822-1898 2075 downloads
- Plomer, Henry R. (Henry Robert) 1856-1928 2068 downloads
- Major, Richard Henry 1818-1891 2034 downloads
- Ramón y Cajal, Santiago 1852-1934 2033 downloads
- Cunningham, Robert Hays - 2024 downloads
- Adams, James R. - 2019 downloads
- Thompson, R. E. - 1980 downloads
- Boak, Arthur E. R. (Arthur Edward Romilly) 1888-1962 1950 downloads
- Lee, Robert E. (Robert Edward) 1843-1914 1950 downloads
- Perés, Ramón D. (Ramón Domingo) 1863-1956 1933 downloads