Commercial Telegraphers Union of America (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Commercial Telegraphers Union of America" in English language version.

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For the early history of the telegraph in the United States, see Robert L. Thompson, Wiring A Continent: The History of the Telegraph Industry in the United States, 1832-1866. Princeton, New Jersey: Princeton University Press, 1947.
Nunnelly, William A. (1991). Bull Connor. Tuscaloosa, Ala.: University of Alabama Press. pp. 181–182. ISBN 0-8173-0495-9.