Lo van Pham honored to be first Asian American NFL official – The Denver Post
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How Much Are NFL Referees Paid? | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
NFL's First All-Black Crew Officiated 'Monday Night Football' Game : NPR
Officials question NFL's process for selecting Super Bowl referee
Official (gridiron football) - Wikipedia
Pereira: Players won't be the only ones battling the Lambeau cold | FOX Sports
Ask Sam Farmer: Are there throwback uniforms for NFL officials? - Los Angeles Times
2022 Roster of NFL Officials | NFL Football Operations
NFL100: Before they were zebras, they were … candy canes? – Football Zebras
Officials' Responsibilities & Positions | NFL Football Operations
Column: NFL officials make far too many mistakes, and it's worse in the playoffs - The San Diego Union-Tribune
The Gridiron Uniform Database
NFL To Hire Up To 24 Full-Time Game Officials - JetNation.com (NY Jets Blog & Forum)
Ex-ref says officials had 'administrative breakdown' in Steelers loss
Official (gridiron football) - Wikipedia
At the Top of His Game - Harvard Law School | Harvard Law School
NFL Referee Assignments Super Bowl LVII & Their Impact on NFL Betting – Sharp Football Analysis
1920s Football Referee Uniform — La Crosse County Historical Society
