Why Steelers' logo is only on one side of the helmet: History and meaning of Pittsburgh's logo
SteelBriefs - American Iron and Steel Institute
The History Behind the Logo: The Steelmark – YinzerShop
History Of The Steelers Logo and The Team - Logo Design Magazine
History Of The Steelers Logo and The Team - Logo Design Magazine
How did the Pittsburgh Steelers get their name? Origin and meaning? - AS USA
Pittsburgh Steelers Logo and symbol, meaning, history, PNG, brand
The Voice of the American Steel Industry
Steelers logo and some history behind the team