United States. Federal Communications Commission. FCC Record, Volume 27, No. 2, Pages 937 to 1877, February 6 - February 17, 2012, book, February 2012; (https://digital.library.unt.edu/ark:/67531/metadc94251/m1/36/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .