The impact of the telegraph on public time in the United States, 1844-93DOI: info:10.1109/44.17681v. 8No. 1IEEE4–10
Stephens, Carlene E. 1989. "The impact of the telegraph on public time in the United States, 1844-93." Technology and Society Magazine, 8, (1) 4–10. https://doi.org/10.1109/44.17681.