Cite
. “ Summary of Project, Nationwide Development Disabilities Study, October 20, 1976” Lowcountry Digital Library, Avery Research Center at the College of Charleston, 1976-10-20.
. “ Summary of Project, Nationwide Development Disabilities Study, October 20, 1976” Lowcountry Digital Library, Avery Research Center at the College of Charleston, 1976-10-20.