Database
NMR Database of Model Compounds for Lignin and Related Plant Cell Wall Components.
S.A. Ralph, L.L. Landucci and J. Ralph.
Available from http://ars.usda.gov/Services/docs.htm?docid=10429
(previously http://www.dfrc.ars.usda.gov/software.html);
updated 1996,
1998, 2000, 2001, 2002, 2003, 2004, 2005, 2006.