Part of the Frick Collection Archives Repository
Allegheny Observatory, 1966-1972, Box: 51, Folder: 5. Helen Clay Frick Papers, Series III: Iron Rail Vacation Home, FFP.02.03. Frick Collection Archives.
Allegheny Observatory, 1966-1972, Box: 51, Folder: 5. Helen Clay Frick Papers, Series III: Iron Rail Vacation Home, FFP.02.03. Frick Collection Archives. https://archives.frick.org/repositories/3/archival_objects/10582 Accessed April 20, 2025.
