![](http://www.alamy.com/thumbs/6/05CDFD4F-DA48-489B-8567-C607C135DA5F/RHWM9M.jpg)
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. CARRIER SYSTEMS ON TELEPHONE LINES 595. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Telephone and Telegraph Company. [Short Hills, N. J. , etc. , American Telephone and Telegraph Co. ]
Size: 929px × 2691px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1