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Labor force definition and measurement: recent experience in the United States, prepared by L.J. Ducoff and M.J. Hagood for the Subcommittee on Labor Force Statistics of the Committee on Labor Market Research

Social Science Research Council (U.S.). Committee on Labor Market Research

URL	http://books.google.com.hk/books?id=ND_BnQEACAAJ&hl=&source=gbs_api