1920's / 1930's - The Rise of A/V (1 янв 1920 г. – 31 дек 1939 г.)
Описание:
This decade saw the rise of the radio and audio movement - which over the next two decades ultimately had little impact on facilitating instruction.Добавлено на ленту времени:
Дата:
1 янв 1920 г.
31 дек 1939 г.
~ 20 years
