Authors:
Roland Rau Cards were created by Byron Knoll and released into
the public domain. They were downloaded from
http://code.google.com/p/vector-playing-cards/downloads/detail?name=PNG-cards-1.2.zip
on 2012-06-08. Byron Knoll stated in his blog that the cards
were released by him into the public domain:
http://byronknoll.blogspot.de/2011/03/vector-playing-cards.html
The backside of the cards were created by Roland Rau using the
R-Logo.