| Verfasser | Häufigkeit |
| Davison, John Wells |
4 |
| Hirst, David W |
4 |
| Link, Arthur S. 1920-1998 |
4 |
| Little, John E. |
4 |
| Motter, Thomas Hubbard Vail 1901- |
4 |
| Wilson, Woodrow 1856-1924 |
4 |
| Díaz Alvarez, Ana María |
1 |
| Liptak, Julius M. |
1 |
| McLachlan, Jenny |
1 |
| Thamm, Douglas H. |
1 |
| Vail, David M. |
1 |