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 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
| Description | Signature of Hermann von Helmholtz |
| Source | Physik in Stichworten, Optik und Reltivitätstheorie, Hirt's Stichwortbücher (1965) |
| Author | Hermann von Helmholtz |
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This signature is believed to be ineligible for copyright and therefore in the public domain because it falls below the required level of originality for copyright protection both in the United States and in the source country (if different). In this case, the source country (e.g. the country of nationality of the signatory) is believed to be Germany.
Note that this tag cannot be used on all signatures, as not all signatures are copyright-free.
See Commons:When to use the PD-signature tag for an explanation of when the tag may be used. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:04, 5 October 2012 | | 1,228 × 840 (56 KB) | Bautsch | {{Information |Description=Signature of Hermann von Helmholtz |Source=Physik in Stichworten, Optik und Reltivitätstheorie, Hirt's Stichwortbücher (1965) |Date= |Author=Hermann von Helmholtz |Permission= |other_versions= }} {{PD-signature|Germany}} [... |
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