United States. Federal Communications Commission. FCC Record, Volume 19, No. 8, Pages 5879 to 6813, March 31 - April 13, 2004, book, April 2004; (https://digital.library.unt.edu/ark:/67531/metadc4077/m1/732/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .