Picture Exchange Communication System With Individuals With Developmental Disabilities: A Meta-Analysis of Single Subject Studies - Stephanie L. Hart, Devender R. Banda, 2010
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WHY DO I USE PECS? - Pyramid Educational Consultants of Australia
PECS® Activity Board - Picture exchange communication, Pecs pictures, Picture exchange communication system
Helping Families Implement PECS® at Home - Pyramid Educational Consultants
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PECS Myths and Misconceptions 2010 - PECSAustralia.com!