By Cummins Robert   Miller Douglas   Theobald Theresa   in Journal of Intellectual & Developmental Disability

ISSN:1469-9532|15|2|143-146

Informa Healthcare‎(1989)‎

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By Cummins Robert   Polzin Udo   Theobald Theresa   in Journal of Intellectual & Developmental Disability

ISSN:1469-9532|16|3|219-232

Informa Healthcare‎(1990)‎

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By Cummins Robert   Polzin Udo   Theobald Theresa   in Journal of Intellectual & Developmental Disability

ISSN:1469-9532|16|4|305-321

Informa Healthcare‎(1990)‎

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