There is a book about the history and governmental battles to establish clear channel radio stations in the United States. It is titled "Big Voices of the Air: The Battle Over Clear Channel Radio," by Dr. James C. Foust. This work came from his Ph.D. dissertation. Dr. Foust is an Associate Professor of Journalism at Bowling Green State University in Ohio. The book is published by the Iowa State University Press, and is available on Amazon, and other booksellers. It is an excellent resource and historical research work.
Richard Robinson (email@example.com)