1 gen 1876 anni - The Association of Medical Officers of American Institutions for Idiots and Feeble-Minded Persons is formed (which late; in 1933, becomes the American Association on Mental Deficiency, then the American Association on Mental Retardation in 1987). In 2006, it becomes the American Association on Intellectual and Developmental Disabilities.
Aggiunto al nastro di tempo:
Data:
1 gen 1876 anni
Adesso
~ 148 years ago
