| Verfasser | Häufigkeit |
|---|---|
| Beach, Walter G. | 2 |
| Walker, Edward E. | 2 |
| Adams, A. E. | 1 |
| Beach, Walter Greenwood | 1 |
| Jamison, Olis G. | 1 |
| Jamison, Olis Glen | 1 |
| Walker, Edward Everett 1900-1974 | 1 |
| Wright, Edgar | 1 |
| Verfasser | Häufigkeit |
|---|---|
| Beach, Walter G. | 2 |
| Walker, Edward E. | 2 |
| Adams, A. E. | 1 |
| Beach, Walter Greenwood | 1 |
| Jamison, Olis G. | 1 |
| Jamison, Olis Glen | 1 |
| Walker, Edward Everett 1900-1974 | 1 |
| Wright, Edgar | 1 |