@inbook{+1948+185+187,
url = {https://doi.org/10.4159/harvard.9780674493124.c21},
title = {CHAPTER 15. COMMUNICATION COMPANIES},
booktitle = {Guide to Business History},
booktitle = {Materials for the Study of American Business History and Suggestions for Their Use},
publisher = {Harvard University Press},
address = {Cambridge, MA and London, England},
pages = {185--187},
doi = {doi:10.4159/harvard.9780674493124.c21},
isbn = {9780674493124},
year = {1948},
lastchecked = {2026-05-07}
}