| Verfasser | Häufigkeit |
| Clay, Diskin William Thomas 1938-2014 |
74 |
| Large, David Clay 1945- |
43 |
| Clay, Lucius D. 1897-1978 |
17 |
| Clay, Diskin |
16 |
| Johnson, Donald Clay |
14 |
| Whybark, D. Clay |
13 |
| Berry, William L. |
10 |
| Vollmann, Thomas E. |
9 |
| Calvert, Clay |
8 |
| Lindgren, Henry Clay 1914-2005 |
7 |
| Byrne, Donn Erwin 1931-2014 |
6 |
| Clay, Dorothy M. |
5 |
| Clay, David E. |
4 |
| Clay, Jenny Strauss 1942- |
4 |
| Nostrand, Howard Lee 1910-2004 |
4 |
| Blair, Clay 1925-1998 |
3 |
| Christensen, Clay B. |
3 |
| Clay, Francis d. 1738 |
3 |
| Clay, Henry |
3 |
| Clay, John |
3 |