Thank you very much for your posts and feedback on the book.
I take full responsibility for the technical error regarding the unit designation for the 75th Rangers. I know better, but it slipped by in the edit and proofing of the text.
With regard to the rest of the sources cited in the book, in simple terms, we did the best we could with what we had. Bob Taylor was the primary source of information and was incredibly helpful throughout the entire process. Black Belt/Ohara Publications, TRS, and AMK were also very accomodating in their support. The other companies and publications that could have supported the project chose not to, so some materials that I would have liked to use were not included. Please don't take offense at the exclusion of any of your work on the subject as it was not my intent to be disrespectful.
Spyderco Special Projects Coordinator
Founder and Lead Instructor, Martial Blade Concepts