3 ms·
The Evolution and Special Features of Bell System Telephone Equipment Buildings: https://archive.org/details/bstj58-2-427 https://archive.org/details/bstj58-2-4
by b1c837696ba28b 6y ago
The Evolution and Special Features of Bell System Telephone Equipment Buildings: https://archive.org/details/bstj58-2-427 https://archive.org/details/bstj58-2-427