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30 Apr 1838 Jahr - Stereoscope image viewers were created.

Beschreibung:

By Joaquim Alves Gaspar (Own work (own photo)) [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) or CC BY 2.5 (http://creativecommons.org/licenses/by/2.5)], via Wikimedia Commons

Zugefügt zum Band der Zeit:

A Brief History of Educational Technology

ByGeorge Tam
18 Sep 2017
0
0
829

Datum:

30 Apr 1838 Jahr
Jetzt
~ 187 years ago

Abbildungen:

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