NFL To Hire Up To 24 Full-Time Game Officials - JetNation.com (NY Jets Blog & Forum)
Here's how much NFL referees get paid
Officials' Responsibilities & Positions | NFL Football Operations
Official (gridiron football) - Wikipedia
At the Top of His Game - Harvard Law School | Harvard Law School
The Gridiron Uniform Database
How Do NFL Officials Communicate on the Field?
All-Black officiating crew makes NFL history | KTLA
NFL Referee Ron Torbert Makes the Tough Calls | Harvard Magazine
Ask Farmer: Why do NFL referees have numbers? - Los Angeles Times
/cdn.vox-cdn.com/uploads/chorus_image/image/71359429/usa_today_17483829.0.jpg "Peyton and Eli Manning admire referee Clete Blakeman's buff body - Outsports")
Peyton and Eli Manning admire referee Clete Blakeman's buff body - Outsports
Officials' Responsibilities & Positions | NFL Football Operations
Column: Throw a flag on these NFL refs - WTOP News
1960's Jim Tunney Game Worn NFL Referee Jersey. ... Football | Lot #51347 | Heritage Auctions
Ask Sam Farmer: Are there throwback uniforms for NFL officials? - Los Angeles Times
Column: NFL officials make far too many mistakes, and it's worse in the playoffs - The San Diego Union-Tribune
Here's how much money NFL officials make working games - NBC Sports Chicago
1920s Football Referee Uniform — La Crosse County Historical Society
Officials question NFL's process for selecting Super Bowl referee
NFL100: Before they were zebras, they were … candy canes? – Football Zebras
Sports world reacts to all-black referees on MNF - HBCU Gameday
All-Black officiating crew makes NFL history
