Part of the Frick Collection Archives Repository
#129: Interest in Union Improvement Co., 1900-1915, Box: 21, Folder: 2. Henry Clay Frick Papers, Series V: Subject Files, FFP.01.05. Frick Collection Archives.
#129: Interest in Union Improvement Co., 1900-1915, Box: 21, Folder: 2. Henry Clay Frick Papers, Series V: Subject Files, FFP.01.05. Frick Collection Archives. https://archives.frick.org/repositories/3/archival_objects/8253 Accessed February 26, 2025.
