CFL Expansion: A Look Into the Defunct U.S. Teams - Allegiant Goods Co.
World League 1992 - FootballIdiot
ELF Europe – Gridiron Football
NFL History: 100 objects that tell the story of football - Sports Illustrated
NFL Europe, American Football Wiki
European American Football – Gridiron Football
The Leagues Are Long Gone, But The Cards Live On
Will Gridiron (American football) overtake Football in Europe? It's quite popular in Germany and the European League of Football (Gridiron) just started - Quora
WLAF/ NFLE The Football Autograph Encyclopedia
Gone but not Forgotten: The 1991 Raleigh-Durham Skyhawks