Authors: R. (sorted by release date)
- Enthoven, R. E. (Reginald Edward) 1869-1952 Jul 16, 2018
- Bethune, C. R. Drinkwater (Charles Ramsay Drinkwater) 1802-1884 Jul 13, 2018
- Richards, R. (Robert) 1884-1954 Jul 13, 2018
- Gruger, Frederic Rodrigo 1871-1953 Jul 12, 2018
- R. H. R. - Jun 25, 2018
- Bond, W. R. (William R.) 1839-1922 Jun 25, 2018
- Cunninghame Graham, R. B. (Robert Bontine) 1852-1936 Jun 20, 2018
- Wheelan, Albertine Randall - Jun 17, 2018
- Gilchrist, Murray 1868-1917 Jun 10, 2018
- Redaelli, Carlo - May 14, 2018
- R. M. Kellogg Co. - May 9, 2018
- Evans, Henry Ridgely 1861-1949 May 1, 2018
- Vosburgh, R. G. - Apr 11, 2018
- Praeger, R. Lloyd (Robert Lloyd) 1865-1953 Apr 2, 2018
- Cram, Ralph Adams 1863-1942 Mar 27, 2018
- Knowles, Robert E. (Robert Edward) 1868-1946 Mar 4, 2018
- Daggett, Rollin Mallory 1831-1901 Feb 18, 2018
- Shaw, Edward R. (Edward Richard) 1855-1903 Feb 17, 2018
- Macalister, Robert Alexander Stewart 1870-1950 Feb 4, 2018
- Pennell, Elizabeth Robins 1855-1936 Jan 26, 2018
- Ament, R. S. - Jan 24, 2018
- Stephens, Robert Neilson 1867-1906 Jan 13, 2018
- Darling, Charles R. (Charles Robert) 1870- Jan 10, 2018
- Wagner, Johannes Rudolf 1822-1880 Jan 7, 2018
- Van Bergen, R. (Robert) - Jan 3, 2018