Authors: Richard
- Bagot, Richard 1860-1921 306 downloads
- Cantillon, Richard -1734 304 downloads
- Hutton, Richard Holt 1826-1897 302 downloads
- Culver, R. K. (Richard Keith) 1873-1937 302 downloads
- Newton, Richard Heber 1840-1914 301 downloads
- Pearson, Richard 1765-1836 300 downloads
- Ely, Richard T. (Richard Theodore) 1854-1943 299 downloads
- Duckworth, Richard - 298 downloads
- Swain, Richard La Rue 1860- 293 downloads
- Richardson, James (Geologist) - 292 downloads
- Sternbach, Richard A. - 288 downloads
- McMurry, Richard M. - 287 downloads
- Schaukal, Richard von 1874-1942 287 downloads
- Parker, Richard Green 1798-1869 280 downloads
- Richardson, John A. - 279 downloads
- Maples, Richard - 277 downloads
- Wegg-Prosser, F. R. (Francis Richard) 1824- 276 downloads
- Tongg, Richard C. 1899- 274 downloads
- Vernon, John Richard 1833-1902 274 downloads
- Brookes, R. (Richard), active 1721-1763 - 274 downloads
- Hook, Richard A. - 273 downloads
- Challoner, Richard 1691-1781 273 downloads
- Richardson, Dorothy 1882- 272 downloads
- Magruder, Richard - 267 downloads
- Vincent, Marvin R. 1834-1922 264 downloads
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