File:Petzval Josef 1904 Theorie der Tonsysteme.pdf
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Petzval_Josef_1904_Theorie_der_Tonsysteme.pdf (file size: 8.44 MB, MIME type: application/pdf)
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 19:48, 23 July 2014 | (8.44 MB) | Dusan (talk | contribs) |
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