http://assets.cambridge.org/97805211/92026/cover/9780521192026.jpg
http://catdir.loc.gov/catdir/enhancements/fy1117/2011035580-b.html
http://catdir.loc.gov/catdir/enhancements/fy1117/2011035580-d.html
http://catdir.loc.gov/catdir/enhancements/fy1117/2011035580-t.html