Darstellung Zusammenarbeit Marconi
<a href="https://de.wikipedia.org/wiki/User:Webcyss" class="extiw" title="de:User:Webcyss">Webcyss</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span> (<span lang="en" dir="ltr">Original text: <i><bdi lang="">selfmade</bdi></i></span>)