American Society for Deaf ChildrenASDC was founded in 1967 as a parent-helping-parent organization. Today, ASDC is an national, independent non-profit organization whose purpose is providing support, encouragement, and information to families raising children who are deaf or hard of hearing.
P.O. Box 3355
Gettysburg, Pennsylvania 17325
Telephone: 800/942-2732 or 717/334-7922.