We have one object that Haas & Hahn 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/18064245/ |title=Haas & Hahn |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=6 August 2020 |publisher=Smithsonian Institution}}</ref>