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The chart traces the course of industrial activity in the last four weeks
Diagram traces the course of industrial activity during four weeks in June and July in 1938, compared to industrial activity during the same time in 1937.
5.8 x 5 cm
black and white
- still image
- These materials are either in the public domain, according to U.S. copyright law, or permission has been obtained from rights owners. The digital version and supplementary materials are available for all educational uses worldwide.
- The Janet A. Ginsburg Chicago Tribune Image Collection
- Chicago Sunday Tribune (July 24, 1938), Part 2, p. 7