United States. Federal Communications Commission. FCC Record, Volume 3, No. 16, Pages 4631 to 4873, August 1 - August 12, 1988, book, August 1988; (https://digital.library.unt.edu/ark:/67531/metadc1621/m1/1/: accessed November 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .