Although its been quite a while, following class a couple of weeks ago I was still interested in how animation had been done previously in analog. I came across a short interesting documentary that described the stages involved in Snow Whites development. The video details appears to be The process had certainly been detailed and makes oneself thankful for the advent of digital. I also found another video that details the workings of the multiplane camera.
Here is the article and documentary: http://www.openculture.com/2011/04/how_walt_disney_cartoons_are_made_.html
Multiplane Camera Video: https://www.youtube.com/watch?v=YdHTlUGN1zw