Authors: R.
- Ralston, William Ralston Shedden 1828-1889 4 books
- Bonnycastle, Richard Henry, Sir 1791-1847 4 books
- Hildreth, Richard 1807-1865 4 books
- Payró, Roberto Jorge 1867-1928 4 books
- Mead, G. R. S. (George Robert Stow) 1863-1933 4 books
- Conder, C. R. (Claude Reignier) 1848-1910 4 books
- Doede, William R. 1918-2007 4 books
- Shepherd, Richard Herne 1842-1895 4 books
- Barnes, Robert 1840-1895 4 books
- Mears, James R. - 4 books
- Stacy, John R. - 4 books
- Withington, Elizabeth R. (Elizabeth Rupp) 1883-1962 4 books
- Beard, Mary Ritter 1876-1958 4 books
- Brummer, F. F. (Frans Ferdinand) 1847-1893 4 books
- Torrey, R. A. (Reuben Archer) 1856-1928 4 books
- Regnard, Jean-François 1655-1709 4 books
- Gleig, G. R. (George Robert) 1796-1888 3 books
- Smith, H. R. - 3 books
- Starzl, Roman Frederick 1899-1976 3 books
- Wellington, R. (Richard) 1884-1975 3 books
- Bradley, Richard 1688-1732 3 books
- Wingate, F. R. (Francis Reginald), Sir 1861-1953 3 books
- Vosburgh, R. G. - 3 books
- Gale, Norman 1862-1942 3 books
- Knowles, Robert E. (Robert Edward) 1868-1946 3 books
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