Southwestern Bell Telephone Company; Test Center to Whitehall Dial, additions and alterations, 1957.

Southwestern Bell Telephone Company; Test Center to Whitehall Dial, additions and alterations, 1957., Box: NEL108, Folder: 5. Donald S. Nelson collection, NEL. Alexander Architectural Archives. https://archives.lib.utexas.edu/repositories/2/archival_objects/66185 Accessed September 25, 2026.