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2. National Science Foundation, National Center for Science and Engineering Statistics (2013) Science and engineering degrees: 1966–2010. Available at nsf.gov/statistics/nsf13327/. Accessed November 20, 2014
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4. Higher Education Research Institute (2013) Survey of the American freshman: Special tabulations. Los Angeles, CA. Available at www.nsf.gov/statistics/wmpd/2013/pdf/tab2-8.pdf. Accessed November 20, 2014
5. National Science Foundation (2009) Women, minorities, and persons with disabilities in science and engineering: 2009. Available at www.nsf.gov/statistics/wmpd/. Accessed November 20, 2014