In case you have missed it, animator Andreas Deja has started a blog called Deja View. He has already posted a large quantity of great artwork by legendary animators and illustrators (Sullivant and Kley) that I havn't seen elsewhere.
If you haven't checked it out already, you should!
Just click HERE.
This also gives me an opportunity to show the nice drawing I got in Andreas sketchbook A different stripe. (Stil available from Stuart NG books!) Enjoy!