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Hearing Before a Subcommittee of the Committee on Education and Labor, United States Senate, Seventy-sixth Congress, Third Session, on S. 4041, a Bill to Establish a Division of Aviation Education in the United States Office of Education, Federal Security Agency, and for Other Purposes. July 9, 1940
出版U.S. Government Printing Office, 1940
URLhttp://books.google.com.hk/books?id=JZ5sAAAAMAAJ&hl=&source=gbs_api
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