@book{24761, author = {Walton, Catherine and Kerr, Mike}, title = {Severe Intellectual Disability :}, year = {2016}, series = {Journal of Applied Research in Intellectual Disabilities}, url = {https://ihc.idm.oclc.org/login?url=http://onlinelibrary.wiley.com/doi/10.1111/jar.12203/full} }