| Verfasser | Häufigkeit |
| Lipsitt, Lewis Paeff |
3 |
| Spiker, Charles C. |
3 |
| Banwart, Mary Christine |
2 |
| Bystrom, Dianne G. |
2 |
| McKinney, Mitchell S. 1965- |
2 |
| Warner, Benjamin R. |
2 |
| Gori, Paula L. |
1 |
| Milici, Robert C. 1931- |
1 |
| Spiker, Carlisle T. |
1 |
| Spiker, Christian Wilhelm |
1 |
| Spiker, Elliott C. |
1 |
| Wilson, John M. |
1 |