Central Union Telephone Company oversize blueprints, OBE033, Folder: OBE033-01; Folder: OBE033-02; Folder: OBE033-03; Folder: OBE033-04. Rare Books and Manuscripts.
Central Union Telephone Company oversize blueprints, OBE033, Folder: OBE033-01; Folder: OBE033-02; Folder: OBE033-03; Folder: OBE033-04. Rare Books and Manuscripts. https://archives.isl.lib.in.us//repositories/2/resources/6427 Accessed April 20, 2025.
