This just in thanks to Jim Korkis:
Working for Disney: 1936-1937 - The Ingeborg Willy Scrapbook
[Reproduction of a 1936 scrapbook made during Ingeborg Willy's first year working as an inker for the Walt Disney Studios. The scrapbook contains numerous photos of other Disney employees, internal memos, production work sheets, and a large number of original pencil sketches from the first feature-length animated film, Snow White, and other early Disney cartoons.]
This self-published book is definitely one I will pick up. Not so much because of the sketches, but because of the photographs of the Studio during the Golden Age. I will let you know more about it when I receive it.