| Publication Type: | Journal Article |
| Year of Publication: | 1913 |
| Authors: | Keller, C. |
| Journal: | Wissen und LebenWissen und Leben |
| Volume: | 7 |
| Pagination: | 28-35 |
| Keywords: | inc |
| Publication Type: | Journal Article |
| Year of Publication: | 1913 |
| Authors: | Keller, C. |
| Journal: | Wissen und LebenWissen und Leben |
| Volume: | 7 |
| Pagination: | 28-35 |
| Keywords: | inc |