. "5 The Current and Future U.S. STEM-Degreed Workforce." Examination of the U.S. Air Force's Science, Technology, Engineering, and Mathematics (STEM) Workforce Needs in the Future and Its Strategy to Meet Those Needs. Washington, DC: The National Academies Press, 2010.
NCES (National Center for Education). 2008. The Condition of Education 2008. Report No. NCES 2008–031. Washington, D.C.: U.S. Department of Education, National Center for Education 2008 Statistics.
NRC (National Research Council). 2006. Issues Affecting the Future of the U.S. Space Science and Engineering Workforce: Interim Report. Committee on Meeting the Workforce Needs for the National Vision for Space Exploration. Washington, D.C.: National Academies Press. Available online at http://www.nap.edu/catalog/11642.html