http://assets.cambridge.org/97805218/80657/cover/9780521880657.jpg
http://www.loc.gov/catdir/enhancements/fy1010/2010021906-b.html
http://www.loc.gov/catdir/enhancements/fy1010/2010021906-d.html
http://www.loc.gov/catdir/enhancements/fy1010/2010021906-t.html