Created by Viktor Almqvist
Contributed by Miguel Sanz
Contributed by Robin Rendle
Contributed by Stephen Coles
Contributed by D. Mx
Contributed by Indra Kupferschmid
Contributed by Matthijs Sluiter
Contributed by Nick Sherman
Contributed by Florian Hardwig
Photo(s) by Frank Grießhammer on Flickr.
Contributed by Herb Lubalin Study Center