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Doctorate Production in United States Universities, 1936-1956
National Research Council (U.S.). Office of Scientific Personnel
其他書名
With Baccalaureate Origins of Doctorates in the Sciences, Arts, and Humanities
出版National Academy of Sciences, National Research Council, 1958
URLhttp://books.google.com.hk/books?id=Zr8P_8ErjbEC&hl=&source=gbs_api