H. V. Turpeinen

John F. Manthey

John Manthey worked for the United States Engineer District Office.

William A. Hichler

William A. Hichler was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

M. L. Jackson

M. L. Jackson worked for the J.A. Jones Construction Company.

R. L. Jarvis