Authors: Ro
- Ruck, Berta 1878-1978
- Rudder, Robert S. -
- Rudolph, R. J. W. (Roelof Jan Willem) 1862-1914
- Russell, Robert J. -
- Russell, R. V. (Robert Vane) 1873-1915
- Ruth, Rod 1912-1987
- Sacchetti, Roberto 1847-1881
- Saint-Simon, Louis de Rouvroy, duc de 1675-1755
- Salade, Robert F. 1880-
- Salisbury, Rollin D. 1858-1922
- Samber, Robert -
- Sampson, Robert 1927-1992
- Sanderson, John 1783-1844
- Sanderson, R. E. (Robert Edward) 1830-1913
- Sandvoss, Rosalie 1821-1895
- Savary, Anne-Jean-Marie-René, duc de Rovigo 1774-1833
- Sawyer, Robert J. 1960-
- Scaife, Roger Livingston 1875-1951
- Scharff, R. F. (Robert Francis) 1858-1934
- Schauffler, Robert Haven 1879-1964
- Schmidt, Rochus 1860-1938
- Schoolcraft, Henry Rowe 1793-1864
- Schultz, James Willard 1859-1947
- Schulz, Robert 1928-1978
- Schumann, Robert 1810-1856
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