United States. Government Accountability Office. Depot Maintenance: Navy Has Revised Its Estimated Workforce Cost for Basing an Aircraft Carrier at Mayport, Florida, text, March 3, 2011; (https://digital.library.unt.edu/ark:/67531/metadc297589/m1/1/: accessed December 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .