Journal Article Production Trends in the United States since 1870 Get access 80. Production Trends in the United States since 1870. By A. F. Burns. 1934. (New York: National Bureau of Economic Research. 8vo. xxxii + 363 pp.) E. V. Francis E. V. Francis Search for other works by this author on: Oxford Academic Google Scholar International Affairs, Volume 13, Issue 4, July-August 1934, Page 603, https://doi.org/10.2307/2603458 Published: 01 July 1934
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A 1934 study studied this question.