We have one object that Mrs. Armstrong's School, Lancaster, Pennsylvania 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://www-6.collection.cooperhewitt.org/people/18536329/ |title=Mrs. Armstrong's School, Lancaster, Pennsylvania |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=17 May 2021 |publisher=Smithsonian Institution}}</ref>