Report of the Director of Research
Published Date
Copyright 1940
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Copy CitationWesley C. Mitchell, The National Bureau's Social Function, Twentieth Annual Report of the Director of Research, A Record of 1939 and Plans for 1940 (NBER, 1940), https://www.nber.org/books-and-chapters/national-bureaus-social-function-twentieth-annual-report-director-research-record-1939-and-plans/report-director-research.