Ciekawostki
Tajemnicza historia kart kredytowych
http://www.youtube.com/watch?v=4nKkFNyLsMM&feature=related
http://www.youtube.com/watch?v=aITpE6aDheg&feature=related
http://www.youtube.com/watch?v=6zGTziQG578&feature=related
http://www.youtube.com/watch?v=IUkki-mjjuA&feature=related
http://www.youtube.com/watch?v=xLopPJXP9TQ&feature=related
http://www.youtube.com/watch?v=q9f1uUM_ESA&feature=related