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Preliminary Statements Submitted to the White House Conference on Children in a Democracy, January 18-20, 1940, Washington, D.C.
WHITE HOUSE CONFERENCE ON CHILDREN IN A DEMOCRACY, WASHINGTON
出版United States Department of Labor, 1940
URLhttp://books.google.com.hk/books?id=_3vaAAAAMAAJ&hl=&source=gbs_api
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