We have 2 objects that Johann Georg Hertel has been involved with.

If you would like to cite this person in a Wikipedia article please use the following template:

<ref name=CH>{{cite web |url=https://collection.cooperhewitt.org/people/18060717/ |title=Johann Georg Hertel |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=21 July 2019 |publisher=Smithsonian Institution}}</ref>