Dr. D. Spence, well known rubber chemist and specialist, Major Evan W. Kelley of the United States Forest Service in charge of the Government project and Senator Sheridan Downey. :39

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Title:

Dr. D. Spence, well known rubber chemist and specialist, Major Evan W. Kelley of the United States Forest Service in charge of the Government project and Senator Sheridan Downey.

Contributing Institution:

UC Berkeley, Bancroft Library

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