Haengartner, Ursinus (d.1941), Ms. Coll. 275. E&R Library & Archives.
Haengartner, Ursinus (d.1941), Ms. Coll. 275. E&R Library & Archives. https://archivesspace.erlibrary-archives.org/repositories/2/resources/3486 Accessed October 02, 2025.
