Recreation Therapists of Indiana http://www.rtindiana.com/
Recreation Therapists of Indiana, Inc. (RTI) is a professional organization representing recreational therapists throughout the state of Indiana. RTI is a chapter affiliate of the American Therapeutic Recreation Association (ATRA).
The American Therapeutic Recreation Association http://www.atra-tr.org
Largest US, national professional organization representing the interests and needs of recreational therapists. Defines therapeutic recreation as the provision of Treatment services and the provision of Recreation services to persons with illnesses or disabling conditions.
Therapeutic Recreation Directory http://www.recreationtherapy.com/
Presents a wide variety of resources including employment, internship, association, academic, activity ideas, and discussion forums. Probably the largest therapeutic recreation/recreation therapy site.