United States. Government Accountability Office. Defense Management: Foundational Steps Being Taken to Manage DOD Business Systems Modernization, but Much Remains to be Accomplished to Effect True Business Transformation, text, November 9, 2005; (https://digital.library.unt.edu/ark:/67531/metadc292747/m1/1/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .