| Verfasser | Häufigkeit |
|---|---|
| Tonne, Herbert A. | 6 |
| Freeman, M. Herbert | 2 |
| Popham, Estelle L. | 2 |
| Jones, Lloyd L. | 1 |
| MacGill, Esby C. | 1 |
| Nanassy, Louis C. | 1 |
| Price, Ray G. | 1 |
| Simon, Sidney I. | 1 |
| Tonne, Herbert Arthur | 1 |
| Verfasser | Häufigkeit |
|---|---|
| Tonne, Herbert A. | 6 |
| Freeman, M. Herbert | 2 |
| Popham, Estelle L. | 2 |
| Jones, Lloyd L. | 1 |
| MacGill, Esby C. | 1 |
| Nanassy, Louis C. | 1 |
| Price, Ray G. | 1 |
| Simon, Sidney I. | 1 |
| Tonne, Herbert Arthur | 1 |