Authors: R. (sorted by popularity)
- Kelly, R. Talbot (Robert Talbot) 1861-1934 433 downloads
- Driscoll, James R. - 432 downloads
- Adams, James R. - 427 downloads
- Marett, R. R. (Robert Ranulph) 1866-1943 423 downloads
- Appleton, R. B. (Reginald Bainbridge) 1886-1938 422 downloads
- Wollaston, A. F. R. (Alexander Frederick Richmond) 1875-1930 415 downloads
- Wordsworth, R. D. - 414 downloads
- Wylie, I. A. R. (Ida Alexa Ross) 1885-1959 412 downloads
- Payró, Roberto Jorge 1867-1928 406 downloads
- Philp, Robert Kemp 1819-1882 406 downloads
- Enthoven, R. E. (Reginald Edward) 1869-1952 405 downloads
- Woodville, Richard Caton 1856-1927 403 downloads
- Calhoun, A. R. (Alfred Rochefort) 1844- 403 downloads
- Moore, R. H. - 402 downloads
- Inge, William Ralph 1860-1954 397 downloads
- Shepherd, Richard Herne 1842-1895 393 downloads
- Stacy, John R. - 389 downloads
- Smith, T. R. (Thomas Robert) 1880-1942 386 downloads
- Eddison, Eric Rücker 1882-1945 379 downloads
- Becher, Johannes Robert 1891-1958 378 downloads
- Braidwood, Robert J. (Robert John) 1907-2003 377 downloads
- Mikels, Rosa Mary Redding 1862- 375 downloads
- Procter, H. R. (Henry Richardson) 1848-1927 372 downloads
- Lee, Robert E. (Robert Edward) 1843-1914 371 downloads
- Ignacio, Cleto R. - 371 downloads