Authors: R. (sorted by quantity of books)
- Wenckebach, L. W. R. (Ludwig Willem Reymert) 1860-1937 2 books
- Westall, Richard 1765-1836 2 books
- Townshend, R. B. (Richard Baxter) 1846-1923 2 books
- Trowbridge, W. R. H. (William Rutherford Hayes) 1866-1938 2 books
- Smith, H. R. - 2 books
- Glasgow, G. R. (Geraldine Robertson) - 2 books
- Lehmann, R. C. (Rudolf Chambers) 1856-1929 2 books
- Tenreiro, Ramón María 1879-1939 2 books
- Macauley, C. R. (Charles Raymond) 1871-1934 2 books
- Murray, R. F. (Robert Fuller) 1863-1894 2 books
- Tolkien, J. R. R. (John Ronald Reuel) 1892-1973 2 books
- Parke, Robert, active 1588 - 2 books
- Hutchinson, J. R. (John Robert) 1858-1921 2 books
- Scott, Robert Falcon 1868-1912 2 books
- Enthoven, R. E. (Reginald Edward) 1869-1952 2 books
- Fletcher, R. A. - 2 books
- Temple, Richard Carnac, Sir 1850-1931 2 books
- Weekes, R. K. (Rose Kirkpatrick) 1874-1956 2 books
- Withington, Elizabeth R. - 2 books
- Fox, Richard C. - 2 books
- Watling, Roy 1938- 2 books
- Breckinridge, Robert J. (Robert Jefferson) 1800-1871 2 books
- Lillie, R. - 2 books
- Ambedkar, B. R. (Bhimrao Ramji) 1891-1956 2 books
- Charnwood, Godfrey Rathbone Benson, Baron 1864-1945 2 books