Authors: R.
- Raspe, Rudolf Erich 1737-1794
- Rau, Roscoe R. -
- Ray, George R. 1869-1935
- Ray, John 1627-1705
- Ream, Robert R. -
- Redaelli, Carlo -
- Reed, F. R. C. (Frederick Richard Cowper) 1869-1946
- Reeves, R. Harris -
- Regnard, Jean-François 1655-1709
- Reichhardt, Rudolf 1859-1929
- Rennell of Rodd, Francis James Rennell Rodd, Baron 1895-1978
- Reynolds-Ball, Eustace A. (Eustace Alfred) 1858-1928
- Rey, R. (Raymond) -
- R. H. 1609-1678
- R. H. R. -
- R. H. (Robert Howlett) -
- Rice, R. J. -
- Richards, Charles R. (Charles Russell) 1865-1936
- Richards, Harriet Roosevelt -1932
- Richardson, R. -
- Richards, R. C. (Ralph Coffin) 1855-
- Richards, R. (Robert) 1884-1954
- Riggs, Stephen Return 1812-1883
- Rimington-Wilson, Reginald Henry Rimington 1852-1927
- Risley, R. V. (Richard Voorhees) 1874-1904
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