Southwestern Bell Telephone Company; Central Office Building, additions and alterations, Mission, 1947.

Southwestern Bell Telephone Company; Central Office Building, additions and alterations, Mission, 1947., Box: NEL111, Folder: 6. Donald S. Nelson collection, NEL. Alexander Architectural Archives. https://archives.lib.utexas.edu/repositories/2/archival_objects/66209 Accessed September 25, 2026.