L. M. D’Alessio

E. E. Chipman

Chipman worked in the United States Engineer District Office.

Arthur R. Weisberg

Arthur Weisberg was a mechanical engineer with the Special Engineer Detachment assigned to the Metallurgical Lab at the University of Chicago.

D. S. Ewing

D. S. Ewing worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Harold J. Smith