The Association for Behavior Analysis
Disability Related Resources (includes a large section on Autism)
Cambridge Center for Behavioral Studies
New York State Department of Health Clinical Practice Guideline: Autism/Pervasive Developmental Disorders, Assessment and Intervention for Young Children
U.S. Surgeon General's Report on Mental Health, Chapter 3: Children and Mental Health, Autism Section
National Institute of Child Health and Human Development-Facts About Autism