The International Association of Yoga Therapists offers an extensive bibliography of therapeutic applications of yoga, as well as information and referrals to yoga therapists.  Visit www.iayt.org and https://yogatherapy.health.   The Yoga Alliance is a non-profit organization that maintains a national Yoga Teachers Registry to recognize and promote teachers whose training complies with certain educational standards.  For information and referrals visit www.yogaalliance.com.