| Verfasser | Häufigkeit |
| Johnston, Mark |
18 |
| Johnston, Mark W. |
18 |
| Marshall, Greg W. |
11 |
| Johnston, Mark D. |
9 |
| Johnston, Mark 1954- |
6 |
| Johnston, Mark D. 1952- |
5 |
| Farrell, Mark |
4 |
| Johnston, David |
4 |
| Johnston, Mark 1960- |
4 |
| Johnston, Olivia |
4 |
| Johnston, Mark Albert |
3 |
| Lee, Mark |
3 |
| Alldis, John 1929-2010 |
2 |
| Austin, Amy M. |
2 |
| Davies, Meredith 1922-2005 |
2 |
| Dickerson, Bernard |
2 |
| Herincx, Raimund 1927-2018 |
2 |
| Higginbotham, Jennifer |
2 |
| Jenkins, Terry 1941- |
2 |
| Johnston, Mark Albert 1965- |
2 |