| Verfasser | Häufigkeit |
| Hoover, William G. |
9 |
| Hoover, William G. 1936- |
7 |
| Hoover, Herbert 1874-1964 |
6 |
| Hoover, William Graham 1936- |
6 |
| Myers, William Starr 1877-1956 |
4 |
| Hoover, William D. |
3 |
| Hoover, Carol G. |
2 |
| Hoover, Carol Griswold |
2 |
| Hoover, Wesley A. |
2 |
| Hoover, William H. |
2 |
| O'Brien, Francis William 1917- |
2 |
| Tunmer, William E. |
2 |
| Van Voris, William Hoover |
2 |
| Wilson, Woodrow 1856-1924 |
2 |
| Brackett, Frederick Sumner |
1 |
| Erwin, Donald C. |
1 |
| Hoover, Marvin |
1 |
| Hoover, Sarah |
1 |
| Johnston, Earl Steinford |
1 |
| MacMahon, Marilyn |
1 |