Correspondence from George Clark to Pearsall regarding Pyrotronics and correspondence from Joseph Johnson to Pearsall congratulating him on receiving the Small Businessman of the Year Award.
Worcester Polytechnic Institute
, Johnson, Joseph E.
, Clark, George F.
(1981). Two Letters from Baker Industries to Duane Pearsall.. .
Retrieved from: http://digitalcommons.wpi.edu/ms055-04-0009/2