| Verfasser | Häufigkeit |
| Artis, Michael J. 1938- |
2 |
| Coppock, Dennis J. 1921- |
2 |
| Evans, Michael A. |
2 |
| Packer, Martin J. 1954- |
2 |
| Prest, Alan R. 1919-1985 |
2 |
| Sawyer, Malcolm C. 1945- |
2 |
| Sawyer, Robert Keith 1960- |
2 |
| Joseph, Gilbert M. |
1 |
| Rosenberg, Emily S. |
1 |
| Sawyer, M. J. |
1 |
| Sawyer, Suzana |
1 |