Book Binding Dictionary
http://cool.conservation-us.org/don/dt/dt0412.html
Oxford Bibliographical Society
http://www.oxbibsoc.org.uk
Private Libraries Association
http://www.plabooks.org
Publishers Binding Online
http://bindings.lib.ua.edu/bib2.html
The Antiquarian Booksellers Association
http://www.aba.org.uk
The Bibliographical Society
http://www.bibsoc.org.uk
The International League of Antiquarian Booksellers
http://www.ilab.org