| Verfasser | Häufigkeit |
| Cowan, Richard S. |
30 |
| Mennega, Erik A. |
29 |
| Stafleu, Frans A. 1921-1997 |
29 |
| Cowan, Douglas E. 1958- |
18 |
| Cowan, Eleanor Rachel ca. 20./21. Jh |
14 |
| Cowan, Christopher C. |
12 |
| Beck, Don Edward |
9 |
| Cowan, Robert Ernest 1862-1942 |
6 |
| Cowan, Robert Grannis |
6 |
| Edgar, Campbell Cowan |
6 |
| Cowan, Edward J. |
5 |
| Cowan, Edward J. 1944- |
4 |
| Beck, Don Edward 1937-2022 |
3 |
| Bishop, R. E. D. 1925-1989 |
3 |
| Cowan, Douglas E. |
3 |
| Cowan, Eleanor |
3 |
| Ervine, W. Cowan H. |
3 |
| Johnson, Daniel Cowan 1915- |
3 |
| Polónyi, Carl |
3 |
| Cloatre, Emilie |
2 |