Articles specifically about minor league uniforms and logos:
Native American Imagery in the Minors (Case Study: Syracuse Chiefs) Topic: branding history of the Syracuse Chiefs and discussions of Native American imagery in the minors. This article was originally written for Uni Watch, but was spiked shortly before its slated publishing date.
You Can’t Spell Pillbox Without IL Topic: when the International League rolled out league-wide pillbox caps and special patches in 1983 to commemorate the IL’s centennial. This article was also published on Uni Watch.