#47: Lake Erie and Ohio River Ship Canal - List of industrial plants in the Pittsburgh district, 1907

#47: Lake Erie and Ohio River Ship Canal - List of industrial plants in the Pittsburgh district, 1907, Box: 11, Folder: 7. Henry Clay Frick Papers, Series V: Subject Files, FFP.01.05. Frick Collection Archives. https://archives.frick.org/repositories/3/archival_objects/8159 Accessed April 21, 2025.