• Altman, Robert. http://www2.cea.edu/robert/PhotoGallery.html
• "Biographical Encyclopedia" Edited by david Crystal. Cambridge: Cambridge University Press, 1994
• "Websters New World Encyclopedia". Edited by Stephen P Elliott, Martha Coldstein and Michael Upshall. New YorkPrentice Hall, 1990
• My dad, Burt Bosma, thanks for all the help you gave me in compiling the information.
• http://www.corbis.com/

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