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The file "Schumann_resonance_01_en.png" has 1 identical duplication.
- Schumann resonance 01 en.png . . SebastianDuque (talk | contribs) . . 12:47, 5 July 2017
- Schumann resonance 01 en.png . . wikimediacommons>Stw . . 16:22, 19 October 2008