It's been 57 years since the Houston Astros were the Colt .45s
Houston Astros uniforms through history
Astros will don retro jerseys after MLB drops gun control bid
Houston Astros - Wikipedia
The Houston Astros and Wooing Women Fans – Society for American Baseball Research
Rangers-Astros: A look at the rivalry, why fans hate each other
Looking Back While Heading West
Happy 50th, Houston Astros — formerly 'Colt .45s,' almost 'Stars
Retro is in for MLB
The End of the Astros: Bring Back the Houston Colt .45s
Astros vs. Rangers: Will ALCS showdown ignite a Lone Star State rivalry?