Claude Gordon's Approach (published on the International Trumpet Guild's website)
Brass Frequently Asked Questions
Clarke's Technical Studies, then and now
Saint Jacome's Method Original Text (1894 edition)
Claude Gordon - Master Teacher published in The Brass Herald, October 2008 issue
Claude Gordon and Herbert L. Clarke published in The Brass Herald, December 2008 issue
Claude Gordon Routines published in The Brass Herald, February 2009 issue
"Don't stop where I've gone!" - Claude Gordon and Jeff Purtle published in The Brass Herald, May 2009 issue