National Museum of Nuclear Science & History
Margaret Strombeck was a swtichboard operator at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Treadwell worked at the 100-B and 100-D Areas at Hanford during the Manhattan Project.
Chowning worked at the 200 East Area at Hanford during the Manhattan Project.
C. C. Sowers worked for the Tennessee Eastman Corporation at the Y-12 Plant.