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The indexing of the unprocessed digitized microfilms is work in progress. It is conducted, film by film, by members of the Wikipedia Projekt Pressearchiv in cooperation with ZBW. Some films are fully indexed, some only top-level, some not at all.
| Field of activity | Switzerland - Earth science |
| Country | Switzerland |
| Birth | 1849-04-12 |
| GND | 118773658 |
| Holdings | Newspaper clippings: 1929- |
| URI | https://pm20.zbw.eu/folder/pe/007430 |
| ID | pe/007430 |