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In 1919, the US publishing house Macmillan launched a department devoted entirely to children's books
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Modern picturebooks began to develop during the 1920s and 1930s.
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The John Newbery Award was established by the American Library Association.
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Two women Helen Dean Fish and May Massee became the first children's book editors, each at a different company.
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The Horn Book Magazine was published by the Bookshop for Boys and Girls in Boston under the guidance of Bertha Mahony and Elinor Whitney.
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May Massee moved to open a children's book department at Viking.
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