1921

Report an issue
 1 mention Dates

he introduces it in 1921 on a paper.

[1:38:16 - 1:38:19] ▶
Browse entities in this video
👤
People 167
🏢
Organizations 46
📍
Locations 7
🌎
GPEs 30
🏛
NORPs 22
📅
Dates 46
🕐
Years 12
🎨
Works of Art 8