<p>Johannes Oerding during Johannes Oerding - Lagerfeuer Acoustics 2021 at Sportgelände Hirschberg, Hirschberg, Baden-Württemberg, Germany on 2021-07-08, Photo: Sven Mandel 
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Promotion: DeMi Promotion Veranstaltungs GmbH &amp; Co. KG
Sven Mandel
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>