http://assets.cambridge.org/97805215/19342/cover/9780521519342.jpg
http://www.loc.gov/catdir/enhancements/fy1010/2010021899-b.html
http://www.loc.gov/catdir/enhancements/fy1010/2010021899-d.html
http://www.loc.gov/catdir/enhancements/fy1010/2010021899-t.html