2019-05-202019-05-201946-03-19https://repository.tcu.edu/handle/116099117/25700Letter from Clement Ehret, director of market research for International Business Machines Corporation, to Sgt. Eldon D. Blanton regarding use of business machines in statistical work for the Army Air Forces.8.5x7 paperPrior written permission from TCU Special Collections required to use any document or photographAviationUnited States Air ForceUnited States ArmyDocument