Chicago Bears: Lance Briggs 2006/07 (L/XL) – National Vintage
William Perry Trading Cards: Values, Tracking & Hot Deals
1989–90 Volume 113 No 1–4 - Phi Delta Theta Scroll Archive
Lot Detail - 1983-93 William Perry Chicago Bears and Nate Newton
William Perry Trading Cards: Values, Tracking & Hot Deals
Ranking the 100 best Bears players ever: No. 99, William Perry
william perry 45 Values - MAVIN
1989 Pro Set William Perry #445 NM-MT Chicago Bears "The
WILLIAM PERRY 1990 PRO SET #455 BEARS HOF THE FRIDGE SUPER BOWL XX