Minnesota Vikings unveil 'Vikings Classic' throwback jersey
Vikings 2003 Prototype Uniforms Leaked - Daily Norseman
File:Minnesota Vikings 2014 Uniforms.png - Wikimedia Commons
The Gridiron Uniform Database
The full story on how the Viking uniforms came to Minnesota - ESPN
Pro Football Journal: 1964 Lions at Vikings—Purple over Purple Uniforms
How the Minnesota Vikings' Uniform History Should Influence a Potential Redesign - Zone Coverage
Vikings unveil uniform combo for Wild Card vs. Giants
Heritage Uniforms and Jerseys and Stadiums - NFL, MLB, NHL, NBA, NCAA, US Colleges: Minnesota Vikings Uniform and Team History