Berta and Elmer Hader

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Berta Hoerner Hader (August 1, 1890 – February 6, 1976) and Elmer Stanley Hader (September 7, 1889 – September 7, 1973) were an American couple who jointly illustrated more than 70 children's books, about half of which they also wrote. They won the annual Caldecott Medal for The Big Snow (1948), recognizing the year's "most distinguished American picture book for children". They received the Caldecott Honor Book Award for Cock-a-doodle-doo in 1940 and The Mighty Hunter in 1944.