The Cubs' road uniforms had centered numbers in 1972. Here's why - Bleed Cubbie Blue
Revealed: The Story Behind the Cubs’ 1972 Road Uni
One-game Cubs, 1970-2009 - Bleed Cubbie Blue
An Overview Of Cubs Road Uniforms 1958-2015 - Bleed Cubbie Blue
MORE
Revealed: The Story Behind the Cubs’ 1972 Road Uni
Here's the worst jersey in Cubs history - Bleed Cubbie Blue
Cubs All-Time Uniform Number List
Colors, caps and logos: 113 years of Cubs uniforms
Chicago Cubs Uniforms by Baseball Almanac
The Cubs' road uniforms had centered numbers in 1972. Here's why
Cubs BCB After Dark: Amaya's Crystal Ball - Bleed Cubbie Blue
Baseball history unpacked, March 16 - Bleed Cubbie Blue