PubMed · 1975 · 39 citations · 0 references
EducationCommunicationSpecial EducationCommunication DisordersNonverbal CommunicationPhysical DisabilitiesBody LanguageCognitive-communication DisordersCommunication RehabilitationLanguage ImpairmentSymbol SystemsCommunication Disability In ChildrenSymbol Communication SystemsSymbol ComprehensionSymbol-based CommunicationSymbol-based Communication Systems