United States. Federal Communications Commission. FCC Record, Volume 2, No. 1, Pages 1 to 409, January 5 - January 16, 1987, book, January 1987; (https://digital.library.unt.edu/ark:/67531/metadc1597/m1/86/: accessed May 3, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .