National Museum of Nuclear Science & History
J. T. Calvert worked for the Union Carbide & Carbon Corporation.
Paul Langguth worked for the United States Engineer District Office.
W. C. Marr worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Helen E. Krinek was a research assistant in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
