V. J. Cronan

Fredrick “Fred” D. Johnson

Fredrick “Fred” D. Johnson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

W. Muldrew

Muldrew worked in the 300 Area at Hanford during the Manhattan Project.

R. Donaldson

H. G. Harder

Harder worked at the 300 Area at Hanford during the Manhattan Project.