Critical Mass Frankfurt Logo by ©OOL - original download link https://workupload.com/file/hA6bbQ1K To avoid future not available links I downloaded the source and created this repository here.
Content of "Creative Commom - Lizenz_license.txt" file:
[ DE ] Critical Mass Frankfurt Logo von ©OOL ist lizenziert unter einer Creative Commons Namensnennung-Nicht kommerziell 4.0 International Lizenz.
Um eine Kopie dieser Lizenz zu sehen, besuchen Sie http://creativecommons.org/licenses/by-nc/4.0/.
[ EN ] Critical Mass Frankfurt Logo by ©OOL is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nc/4.0/.