Track "Newton Cup" based on Iowa Speedway (formally D-Shape Speedway) ------------------------------------------------------------------------------------ Copyright © 2002 Eric Espie Copyright © 2009/2010 Xavier Bertaux, Eckhard M. Jäger & Jaime Vives Piqueres Copyright © 2013 Eckhard M. Jäger Copyleft: this work of art is free, you can redistribute it and/or modify it according to terms of the Free Art license. You will find a specimen of this license on the site Copyleft Attitude http://artlibre.org as well as on other sites.