| Verfasser | Häufigkeit |
| Hill, L. A. 1918- |
11 |
| Fielden, Richard Derrick Spensley |
8 |
| Jones, Clarence Fielden 1893-1991 |
6 |
| Darkenwald, Gordon Gerald |
5 |
| Fielden, R. D. |
3 |
| Darkenwald, Gordon Gerald 1906-1961 |
1 |
| Davidson, Marilyn |
1 |
| Dulek, Ronald E. |
1 |
| Fielden, D. G. |
1 |
| Fielden, John S. |
1 |
| Fielden, Sandra L. |
1 |
| Wood, Glenice J. |
1 |