United States. Federal Communications Commission. FCC Record, Volume 18, No. 10, Pages 6134 to 6998, March 31 - April 11, 2003, book, April 2003; (https://digital.library.unt.edu/ark:/67531/metadc4043/m1/764/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .