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http://www.bls.gov/cps/cpsaat2.pdf
2. Bureau of Labor Statistics, Current Population Survey, Employed persons by detailed occupation and sex, 2000–2009 (unpublished data)
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http://www.bls.gov/cps/cpsaat11.pdf
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http://www.catalyst.org/publication/459/11/2010-catalyst-census-fortune-500-women-executive-officers-and-top-earners
5. Soares R, Carter NM, Combopiano J (2009) 2009 catalyst census: fortune 500 women board directors. Catalyst.
http://www.catalyst.org/publication/357/2009-catalyst-census-fortune-500-women-board-directors