1 янв 1954 г. - Pub. L. 83-531—The Cooperative Research Program allowed limited funding for cooperative educational research by the U.S. Office of Education and colleges, universities, and departments of education. Mental retardation was targeted.
Добавлено на ленту времени:
Дата:
1 янв 1954 г.
Сейчас
~ 70 г назад
