NFL At 100: Evolution of uniforms, from bees to Color Rush
Uni Watch's Friday Flashback -- The Pirates go back to their bumblebee days - ESPN
Pittsburgh Pirates - Wikipedia
Throwback uniform - Wikipedia
Steelers Unveil New Throwback Uniforms - CBS Pittsburgh
How Can We Tell What Will Become Classic?
Best Pittsburgh Pirates Logos of All-Time - Bucs Dugout
Astros never shy about showing their colors
Throwback uniform - Wikipedia
Uni Watch's Friday Flashback: Buzz, buzz go the Pirates - ABC News
What Would New Bucs' Uniforms Possibly Look Like?