File:Ptp p55 img02.png
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Summary
editDescriptionPtp p55 img02.png |
English: Second illustration on page 36 (55) captioned “Duplex Diaphragm” |
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Date | ||||||
Source | https://archive.org/details/PhotographyTheoryAndPractice | |||||
Author | L.P. Clerc | |||||
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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current | 18:39, 10 April 2011 | ![]() | 560 × 556 (142 KB) | Atelierelealbe (talk | contribs) | {{Information |Description ={{en|1=Second illustration on page 36 (55) captioned “Duplex Diaphragm”}} |Source =http://www.archive.org/details/PhotographyTheoryAndPractice |Author =L.P. Clerc |Date =1937 |Permission ={{ |
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