| Verfasser | Häufigkeit |
| Cowan, Richard S. |
56 |
| Stafleu, Frans A. 1921-1997 |
30 |
| Mennega, Erik A. |
29 |
| Cowan, Ruth Schwartz |
9 |
| Cowan, J. R. |
7 |
| Schuh, Russell G. 1941-2016 |
7 |
| Cowan, Ruth Schwartz 1941- |
4 |
| Cowan, Ryan W. |
3 |
| Lockhart, Jennifer L. |
3 |
| Tyler, Mary S. |
3 |
| Cowan, Richard Sumner 1921-1997 |
2 |
| Cowan, Robert J. |
2 |
| Cowan, Ross |
2 |
| Cowan, Stuart |
2 |
| Vander Ryn, Sim |
2 |
| Ó Brógáin, Seán |
2 |
| Adams, Jonathan |
1 |
| Anderson, Robert |
1 |
| Ark, Joan van 1945- |
1 |
| Bakels, Kees 1945- |
1 |