USEFUL LINKS
Many of these links go to Facebook, as the interest group uses that platform to host its reference material instead of a web site.
World Button Association
The National Button Society
Cleaning Buttons
Livery Buttons
The Victoria Button Club, Australia
The British Button Society
Button Books by Jocelyn Howells
Silver Hallmark Index
Military & Uniform Buttons
China Button Collectors
The Buttonhook Society
The Texas State Button Society