# BSTJ 4: 4. October 1925: General Engineering Problems of the Bell System. (Charlesworth, H.P.)

Bell System Technical Journal, 4: 4. October 1925 pp 515-541. General Engineering Problems of the Bell System. (Charlesworth, H.P.)

- Kind: Magazine
- Series: BSTJ 4: 4. October 1925: General Engineering Problems of the Bell System
- Year: 1925
- Archive: [Internet Archive](https://archive.org/details/bstj4-4-515)
- 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)

[Read it](https://invisiblenetwork.ai/print/ia/bstj4-4-515/read)