| Verfasser | Häufigkeit |
| Langfeld, Gregor 1964- |
18 |
| Langfeld, Herbert Sidney 1879-1958 |
11 |
| Langfeld, Andreas 1982- |
6 |
| Langfeld, Roland |
6 |
| Langfeld, Adolf 1854-1939 |
4 |
| Langfeld, William R. |
4 |
| Schaeffer, Helmut A. |
4 |
| Boring, Edwin Garrigues 1886-1968 |
3 |
| Langfeld, C. |
3 |
| Weld, Harry Porter |
3 |
| Brachmann, Jens 1967- |
2 |
| Kleinfield, H. L. |
2 |
| Langfeld, Andreas 1984- |
2 |
| Langfeld, Joachim |
2 |
| Langfeld, Kurt Albert |
2 |
| Langfeld, Lynn |
2 |
| Langfeld, Michael |
2 |
| Noel, Michael |
2 |
| Soeting, Margreeth |
2 |
| Spence, Colin |
2 |