| Verfasser | Häufigkeit |
| Little, Colin |
2 |
| Trowbridge, Arthur Carleton |
2 |
| Trowbridge, Cynthia D. |
2 |
| Williams, Gray A. |
2 |
| Ferris, Cheryl M. |
1 |
| Schockel, Bernard H. |
1 |
| Shaw, Eugene Wesley 1881- |
1 |
| Trowbridge, Arthur C. |
1 |
| Trowbridge, Arthur C. 1885- |
1 |
| Trowbridge, Cynthia A. |
1 |