Schild an der Kläranlage in <a href="https://de.wikipedia.org/wiki/Cappel_(Marburg)" class="extiw" title="de:Cappel (Marburg)">Cappel (Marburg)</a>, <a rel="nofollow" class="external autonumber" href="http://www.stadtwerke-marburg.de/klaeranlage_marburg_cappel.html">[1]</a>
<a href="//commons.wikimedia.org/wiki/User:Hydro" title="User:Hydro">Hydro</a>
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<span class="int-own-work" lang="en">Own work</span>