A central RBTI library seems impossible because of fear that it might be raided.  However, there can be little doubt that a list of known RBTI materials can be quite helpful to the student or researcher. 

Sometimes word of found materials arrive from odd places.  Perhaps someone has died and a spouse simply needs to clean out old materials in a closet.  Perhaps someone noticed the initials "RBTI" on a venue such as Ebay and placed a winning bid.

Whatever the source, all of the early materials are quite valuable some thirty years later.  If you have RBTI materials, please review the table on this page and determine if you have something that should be added.  Whether it be tape sets, class handouts, personal notes, booklets, or who knows what, do understand that the only way others can know is for you to mention what you have to the RBTI forum or the webmaster here.