Bilderherkünfte

Icons

material.io/tools/icons (Apache)

Bilder (CC)

https://www.flickr.com/photos/nyuhuhuu/4443886636
https://www.flickr.com/photos/dave-griffiths/3940857686
https://www.flickr.com/photos/sugree/2220367469
https://www.flickr.com/photos/federicoferoldifoto/16473216041
https://www.flickr.com/photos/ufv/12391584075
https://www.flickr.com/photos/49438630@N00/366309239