BSTJ 9: 3. July 1930: A General Switching Plan for Telephone Toll Service. (Osbourne, H.S.)
New to the public domain this year: published in 1930, it is in the public domain in the United States from 1 January 2026 at the latest, 95 years after its publication (earlier, if its copyright was never renewed). The Copyright Office's Circular 15A
Bell System Technical Journal, 9: 3. July 1930 pp 429-447. A General Switching Plan for Telephone Toll Service. (Osbourne, H.S.)
- Series
- BSTJ 9: 3. July 1930: A General Switching Plan for Telephone Toll Service
- Genres
- Science and mechanics
- Language
- English
- Collection
- The Magazine Rack
- Licence or status
- None stated by the archive
- Who can read it
- Tweens profiles and older (placed by Invisible Network from what the archive says; archives give no ratings)
- Archive
- Internet Archive