| Verfasser | Häufigkeit |
| Clark, John Maurice 1884-1963 |
54 |
| Clark, James Midgley 1888-1961 |
21 |
| Clark, James M. |
11 |
| Cathey, Jack M. |
9 |
| Schroeder, Richard G. |
9 |
| Clark, John Michael |
7 |
| Clark, Myrtle W. |
7 |
| Conrad, Jon M. |
7 |
| Norell, Mark 1957- |
6 |
| Chiappe, Luis M. |
4 |
| Clark, Colin W. |
4 |
| Clark, John M. |
4 |
| Clark, Colin Whitcomb 1931- |
3 |
| Clark, John Bates 1847-1938 |
3 |
| Clark, Jill Macleod |
2 |
| Clark, Myrtle |
2 |
| Norell, Mark A. |
2 |
| Aken, Frank van 1970- |
1 |
| Altangerel, Perle |
1 |
| Angelo, Hillary |
1 |