PROCEEDINGS OF THE SECOND CONGRESS OF THE INTERNATIONAL ASSOCIATION FOR THE SCIENTIFIC STUDY OF MENTAL DEFICIENCY

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• PROCEEDINGS OF THE THIRD CONGRESS OF THE INTERNATIONAL ASSOCIATION FOR THE SCIENTIFIC STUDY OF MENTAL DEFICIENCY. VOL I Y II
  gan: VARIOS AUTORES
  Cyhoeddwyd: (1980)
• FIRST CONGRESS OF THE INTERNATIONAL ASSOCIATION FOR THE SCIENTIFIC STUDY OF MENTAL DEFICIENCY
  Cyhoeddwyd: (2001)
• KEY ISSUES IN MENTAL RETARDATION RESEARCH. PROCEEDINGS OF THE EIGHTH CONGRESS OF THE INTERNATIONAL ASSOCIATION FOR THE SCIENTIFIC STUDY OF MENTAL DEFICIENCY.
  gan: FRASER, W.I
  Cyhoeddwyd: (1991)
• TOWARDS MUTUAL UNDESTANDING PERSON, ENVIRONMENT, COMMUNITY (CONGRESS ABSTRACTS RESUMES DU CONGRES, 12TH WORLD CONGRESS INTERNATIONAL ASSOCIATION FOR THE SCIENTIFIC STUDY OF INTELLECTUAL DISABILITY)
  gan: VARIOS AUTORES
  Cyhoeddwyd: (2004)
• A BRIEF HISTORY OF THE INTERNATIONAL ASSOCIATION FOR THE SCIENTIFIC STUDY OF MENTAL DEFICIENCY (IASSMD)
  gan: CLARKE, A.D.B
  Cyhoeddwyd: (1992)