Illustration styles

I'm on a quest to discover terms and names for all the wonderful kinds of art and illustration in children's picture books. My brain just wants to be able to describe and categorize these things. I'm not having much success yet finding terminology, but I did find a webpage that shows a lot of the variety that's out there.

http://pics.cdn.librarything.com/picsizes/98/db/98db9d9e9f7b8e16374502f6d77434b4...

appears to be set up by the agents of these illustrators. Not any big names, but still lots of talent here.