Americans with Disabilities Act (Mid-Atlantic Region): http://adainfo.org/
American Academy of Pediatrics: http://www.aap.org/
Children's Defense Fund: http://www.childrensdefense.org/
Council for Exceptional Children: http://www.cec.sped.org/home.htm
DEC - Division of early Childhood: http://www.dec-sped.org/
Disability Rights: http://www.adapt.org/
IDEA: http://www.ideapractices.org/
National Early Childhood Technical Assistance Center http://www.nectas.unc.edu/
National Institute on Early Childhood Development & Educations http://www.ed.gov/offices/OERI/ECI/index.html
National Organization for Rare Disorders (NORD) http://www.rarediseases.org/
National Information Center for Children and Youth with Disabilities http://www.nichcy.org/
OSERS: http://www.ed.gov/offices/OSERS
OSEP: http://www.ed.gov/offices/OSERS/OSEP/
TASH: http://www.tash.org/
Zero to Three/National Center for Infants, Toddlers and Families http://www.zerotothree.org/