Sorry if this has already been posted here, I did a search to see if it was and couldn't find it...
A friend sent me to this blog after a discussion about the Silly Symphonies. There's a lot of great black and white photos of the parks, gifs made from the old cartoons, lobby cards, and ads!
http://vintagemickeymouse.tumblr.com/
This one is similar, but it also has stuff from Popeye and Betty Boop among others!
http://rubberhoseanimation.tumblr.com/
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Fellow Americans, I hear your tambourines inside my head and that's no lie!