The Stuttering Foundation of America (SFA) in a non-profit organization since 1947, dedicated to "helping those who stutter." The organization publishes a wide range of inexpensive booklets, available for from $1-3 as well as other materials, such a video tapes. The SFA also maintains a list of Speech-language pathologists who treat stuttering.
Information about SFA Services
The Stuttering Foundation of America can be reached at
P.O. Box 11749
3100 Walnut Grove Road #603,
Memphis, TN 38111

The also have a toll free number: 1-800-992-9392 
and an email address: