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

Courtesy of UC Berkeley, Bancroft Library

http://www.oac.cdlib.org/ark:/13030/tf0199n7zw/?order=1

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