http://assets.cambridge.org/97805217/66913/cover/9780521766913.jpg
http://www.loc.gov/catdir/enhancements/fy1011/2010031691-t.html
http://www.loc.gov/catdir/enhancements/fy1011/2010031691-d.html
http://www.loc.gov/catdir/enhancements/fy1011/2010031691-b.html