The publication may be printed on the back side of the sheets, but I have been afraid to attempt to remove it from the page and have it tear. If anyone knows the publication, let me know.
NOTE: I received the following from David:
December 13, 1937 issue of Life magazine. Three page article titled, "Snow White and the Seven Dwarfs. Disney animates a full-length film."
The first page of the article had a block of text, three model sheets, and a matching background and cel overlay to show the finished product as it would have been photographed.
Color "Snow White" Feature
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From “Ingeborg Willy’s Scrapbook” (1936-1937). A scrapbook of photos, pencil drawings and other items put together by Ingeborg Willy, who was an inker for Disney from 11/23/36 to 11/26/41 and who died in 1999. Acquired 1998. SeqID-0243 Updated: 7/28/2005