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The graphic laboratory of popular science : pitch graph of six seconds of Hitler's speech
Adolf Hitler's photograph is seen next to a pitch graph of his speech.
5.4 x 14.9 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 (May 28, 1939), p. 8