Engineering Industry Training Board.
David J. Gingery
Elman C. Jameson
David T. Blazevic
United Steel Companies.
Christian Rattat
Adam Lucas
William Torrey Harris
Harold Hall
Hans H. Klein
Marcus Bowman
Zbigniew Jaglarz
Robert B. Corbett
United States. Bureau of the Census
Roger William Bolz
Metal Cutting Tool Institute.
Unknown Author
Han Ding