@book{bhlitem57787, title = {The Bell System technical journal }, volume = {v. 13 (1934)}, copyright = {NOT_IN_COPYRIGHT}, url = {https://www.biodiversitylibrary.org/item/57787}, note = {https://www.biodiversitylibrary.org/bibliography/18181}, publisher = {Short Hills, N.J., etc, American Telephone and Telegraph Co, }, author = {American Telephone and Telegraph Company.}, year = {1934}, pages = {740}, keywords = {Communication|Electric engineering|Electronics|Periodicals|Science|Technology|Telecommunication|}, }