1920's / 1930's - The Rise of A/V (1 Jan 1920 Jahr – 31 Dez 1939 Jahr)
Beschreibung:
This decade saw the rise of the radio and audio movement - which over the next two decades ultimately had little impact on facilitating instruction.Zugefügt zum Band der Zeit:
Datum:
1 Jan 1920 Jahr
31 Dez 1939 Jahr
~ 20 years
