File:New York City 1920 telephone directory 3L exchange names BTN2004.png
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| Description |
New York City 1920 telephone directory 3L exchange names |
|---|---|
| Source |
The Bell Telephone News, Volume 9, Number 9 (April 1920) Machine Switching for the Bell System Bankcroft Gherardi and Harry Charlesworth. |
| Date | |
| Author |
Bankcroft Gherardi, Harry Charlesworth |
| Permission (Reusing this file) |
Expired copyright
|
 | This image is in the public domain in the United States. In most cases, this means that it was first published prior to January 1, 1929 (see the template documentation for more cases). Other jurisdictions may have other rules, and this image might not be in the public domain outside the United States. See Wikipedia:Public domain and Wikipedia:Copyrights for more details. |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:13, 6 December 2016 | | 680 × 600 (43 KB) | Kbrose (talk | contribs) | The Bell Telephone News, Volume Number 9 (April 1920) ''Machine Switching for the Bell System'' Bankcroft Gherardi and Harry Charlesworth. Expired copyright {{PD-US}} |
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