United States. Federal Communications Commission. FCC Reports, Second Series, Volume 78, June 21, 1980 to August 20, 1980, report, 1982; (https://digital.library.unt.edu/ark:/67531/metadc306652/m1/1/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .