| Verfasser | Häufigkeit |
| Callahan, Gene |
4 |
| Callahan, Kevin R. |
4 |
| McIntyre, Kenneth B. |
4 |
| Brooks, Lynne M. |
3 |
| Callahan, Bob |
3 |
| Callahan, Harry M. 1912-1999 |
3 |
| Barker, A. D. 1954- |
2 |
| Callahan, Daniel 1930-2019 |
2 |
| Callahan, David 1954- |
2 |
| Callahan, Dennis |
2 |
| Callahan, Marc |
2 |
| Hunt, Eleanor Callahan |
2 |
| Kitzmiller, Rebecca Rutherford |
2 |
| Sproat, Sara Breckenridge |
2 |
| Stetz, Gary S. |
2 |
| Stetz, Gary S. 1962- |
2 |
| Adams, Robert 1937- |
1 |
| Apgar, Kathryn |
1 |
| Baltz, Lewis 1945-2014 |
1 |
| Barry, Gene |
1 |