If you have ever thought of getting into drawing or animation, this is an excellent resource.  Check out the 2 links below there is some great reference material provided.  The best is on the 2nd link where they show the Animation Run Cycle.  This is one of the most famous piece of paper and from what I hear, is still used to this day by up and coming Animators. 

“Preston Blair’s Animation (Book 1) is the best “how to” book on cartoon animation ever published. When Blair put the book together in 1947, he used the characters he had animated at Disney and MGM to illustrate the various basic principles of animation.”

http://www.animationarchive.org/2006/05/media-preston-blairs-animation-first.html

http://www.animationarchive.org/2006/05/media-preston-blairs-animation-1st.html