American Iron and Steel Institute - Best-in-class advocacy
The Voice of the American Steel Industry
The history of the Steelers logo. : r/nfl
House of The Steel Ring Champions
Pittsburgh Steelers Logo History: Unchanged, the Way They Like It
The History Behind the Logo: The Steelmark – YinzerShop
Story behind the Pittsburgh Steelers logo
Why Steelers' logo is only on one side of the helmet: History and meaning of Pittsburgh's logo
NFL fans are only just realizing the hidden meaning behind three stars on the Pittsburgh Steelers logo