This cross-word puzzle was published in vol.5 no. 1 of Mickey Mouse Magazine dated Oct. 1939. The illustration of accompanying the puzzle was actually a modified version of one of the illustrations in the School Days in Disneyville book published by Heath in the same year:
The same issue of Mickey Mouse Magazine also utilized one other illustration featuring the Thee Little Pigs from the same book in its contents page. Aside from appearing in Donald's drawing, Big Bad Wolf himself also makes several appearances in person in School Days in Disneyville, as covered in an earlier post in this blog on May 28th.