Authors: Ro
- Lubbers, Bob 1922-2017 341 downloads
- Hilliard, A. R. (Alec Rowley) 1908-1951 341 downloads
- Dunstan, Wyndham R. (Wyndham Rowland) 1861-1949 341 downloads
- Watt, Robert -1794 341 downloads
- Peterson, Robert, active 1576-1606 - 341 downloads
- Smith, Robert E. - 340 downloads
- Robinson, Will Bennett - 340 downloads
- Robbins, Sarah Stuart 1817-1910 339 downloads
- Kirkpatrick, George R. (George Ross) 1867-1937 338 downloads
- Roderich, Albert 1846-1938 338 downloads
- James, R. (Robert) -1776 338 downloads
- Wood, Roger B. - 337 downloads
- Petherick, Rosa C. 1871-1931 337 downloads
- Casimir, R. (Rommert) 1877-1957 335 downloads
- Roussel, R. T. - 335 downloads
- Crawford, Robert 1831-1914 335 downloads
- Walker, Ronald L. - 334 downloads
- Robinson, H. P. (Henry Peach) 1830-1901 334 downloads
- Crandell, Dwight R. (Dwight Raymond) 1923-2009 333 downloads
- Royal Society of Medicine (Great Britain) - 333 downloads
- Rosenberg, Isaac 1890-1918 333 downloads
- Drake, Joseph Rodman 1795-1820 333 downloads
- Romuáldez, Norberto 1875-1941 332 downloads
- Harrison, Robert - 332 downloads
- Roe, W. R. (William Robert) - 332 downloads
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