http://assets.cambridge.org/97805211/99995/cover/9780521199995.jpg
http://www.loc.gov/catdir/enhancements/fy1101/2010039189-b.html
http://www.loc.gov/catdir/enhancements/fy1101/2010039189-d.html
http://www.loc.gov/catdir/enhancements/fy1101/2010039189-t.html