| Verfasser | Häufigkeit |
| Spangler, Bettina |
13 |
| Spangler, Jonathan 1971- |
4 |
| Ward, J. R. 1969- |
4 |
| Benya, James R. |
3 |
| Karlen, Mark |
3 |
| Mueller, George E. 1918-2015 |
3 |
| Spangler, Christina |
3 |
| Spangler, Eugene R. |
3 |
| Spangler, Gottfried |
3 |
| Spangler, Raymond L. |
3 |
| Halliday, G. R. |
2 |
| Kungl, Melanie T. |
2 |
| Leyh, Rainer |
2 |
| Renwick, Sophie |
2 |
| Schwarzmann, Georg M. |
2 |
| Silva, Manuela Santos 1961- |
2 |
| Spangler, Manuela |
2 |
| Spangler, Marshall R. |
2 |
| Spangler, Merlin G. |
2 |
| Spangler, Ryan Anthony 1977- |
2 |