http://assets.cambridge.org/97805218/53118/cover/9780521853118.jpg
http://www.loc.gov/catdir/enhancements/fy1007/2010011234-b.html
http://www.loc.gov/catdir/enhancements/fy1007/2010011234-d.html
http://www.loc.gov/catdir/enhancements/fy1007/2010011234-t.html