The Dinosaur Scrapbook written by Donald F. Glut and published in 1980 by Citadel Press is a huge collection of old paleoart from a wide variety of illustrators and sculptors, and it's scope is enormous. If you love this group it's definitely worth finding a copy to thumb through. To keep myself from being too overwhelmed, I'm focusing on art in the book that struck me as particularly weird/funny. "EEK! A Purgatoris!"