Authors: Ro
- Macfie, R. A. Scott (Robert Andrew Scott) 1868-1935 May 29, 2020
- Roberts, Rhoda N. 1886- May 28, 2020
- Roberts, Harold DeWitt 1887-1956 May 28, 2020
- Rodriguez, José Dolores - May 23, 2020
- Neuman, Robert W. 1930- May 21, 2020
- Root, Riley 1795-1870 May 17, 2020
- Stauffer, Robert Elihu 1884- May 12, 2020
- Holloway, Robert, active 1771-1808 - May 9, 2020
- Christman, Robert A. (Robert Adam) 1924-2012 May 8, 2020
- Owen, Robert L. (Robert Latham) 1856-1947 May 7, 2020
- Jones, Charlotte Rosalys - May 5, 2020
- Quick, Robert Hebert 1831-1891 May 4, 2020
- Rogers, Robert Athlyi 1891-1931 Apr 27, 2020
- Robins, Elizabeth 1862-1952 Apr 25, 2020
- Soo, Chung Ling 1861-1918 Apr 19, 2020
- Rosenthal, Leon - Apr 16, 2020
- Gibb, H. A. R. (Hamilton Alexander Rosskeen) 1895-1971 Apr 8, 2020
- Ball, Robert S. (Robert Stawell) 1840-1913 Apr 1, 2020
- Rosmer, Ernst 1866-1949 Mar 30, 2020
- Struck, Rose - Mar 28, 2020
- Johnson, Rossiter 1840-1931 Mar 24, 2020
- Humphries, Rolfe 1894-1969 Mar 11, 2020
- Wallace, Robert 1853-1939 Mar 11, 2020
- United States. Forest Service. Rocky Mountain Region - Mar 4, 2020
- Robinson, David M. (David Moore) 1880-1958 Feb 24, 2020
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