# BSTJ 7: 3. July 1928: Carrier Systems on Long Distance Telephone Lines. (Affel, H.A.; Demarest, C.S.; Green, C.W.)

Bell System Technical Journal, 7: 3. July 1928 pp 564-629. Carrier Systems on Long Distance Telephone Lines. (Affel, H.A.; Demarest, C.S.; Green, C.W.)

- Kind: Magazine
- Series: BSTJ 7: 3. July 1928: Carrier Systems on Long Distance Telephone Lines
- Year: 1928
- Archive: [Internet Archive](https://archive.org/details/bstj7-3-564)
- 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/bstj7-3-564/read)