They say Disney Animators had a Perverse sense of humor. This cover blows me away!
Don't know if Ken Hultgren's book 'The art of Animal Drawing' is out of copyright - it seems to be an in demand reference on the subject - but here it is on Internet Archive.
https://archive.org/details/The_Art_of_Animal_Drawing_Construction_Action_Analysis_Caricature_Dover_Art_Inst
Lovely book.
Be nice to see it on the site.
Link to the book: *** Link No Longer Exists: Ha Ha Comics 22 ***