Effectiveness of Combining Tangible Symbols with the Picture Exchange Communication System to Teach Requesting Skills to Children with Multiple Disabilities including Visual Impairment

• Autores: Emad Ali, Stephane Z. MacFarland, John Umbrett
• Localización: Education and training in autism and developmental disabilities, ISSN 2154-1647, Vol. 46, Nº. 3, 2011, págs. 425-435
• Idioma: inglés
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