Authors: Ro
- Aiken, Ednah 1872-1960 1 book
- Cushman, Robert -1625 1 book
- Romero de Terreros, Manuel, marqués de San Francisco 1880-1968 1 book
- Rolleston, Humphry Davy, Sir 1862-1944 1 book
- Bailey, Roy Rutherford 1876-1929 1 book
- Turner, Ronald W. - 1 book
- Aberigh-Mackay, George 1848-1881 1 book
- Bell, Robert Bloomer Hare 1872-1956 1 book
- Barnard, M. R. (Mordaunt Roger) 1828-1906 1 book
- Waterhouse, G. R. (George Robert) 1810-1888 1 book
- Taylor, Robert Bruce 1869- 1 book
- Barton, Roy Franklin 1883-1947 1 book
- Rolandi, Giambattista 1787-1825 1 book
- Roseland, Harry 1866-1950 1 book
- Snow, Eliza R. (Eliza Roxey) 1804-1887 1 book
- Ettinger, R. C. W. (Robert C. W.) 1918-2011 1 book
- Robin, Ralph 1914-1983 1 book
- Brown, R. H. (Robert Hanbury) 1849-1926 1 book
- Mohler, John R. (John Robbins) 1875-1952 1 book
- Sosman, Robert B. (Robert Browning) 1881-1967 1 book
- López Rodrigo, A. - 1 book
- Henry, Robert Mitchell 1873-1950 1 book
- Rosenberg, C. G. (Charles G.) - 1 book
- Wallace, Robert - 1 book
- Turnbull, Robert 1809-1877 1 book
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