Mental retardation, the child and his surroundings : the early detection and stimulation of children in risk of mental retardation caused by socio-cultural factors : papers presented at an extraordinary session of the IUCW Advisory Group on the social problems of children and youth, Ostend, 21-25 November 1977
International Union for Child Welfare.
Geneva International Union for Child Welfare
[1978]
Mental deficiency
Children with mental disabilities