Hi emlace3,
I have a list of web site for buttons, but I can not post them because of eBay rules. I am working on a web site for a button society here in the states and was making up a list of links. So if you want to send me your email and I be happy to email that list. Also, you can do what I did, simply search for button clubs on the internet.
On reference materials, I again have a list of books. Too big place here.
Thanks - Linda at The Responder
Linda Falkenthal