Unknown Author
John Elliott Passmore
Jack Sugar
Margaret Anne Cavanaugh
L. Whalley
Imperial Institute, London. Mineral Resources Department.
Joseph W. Richards
Charles River Associates
Dennis Charles Gaswick
Giuseppe Rombola
John F Papp
David T. (David Talbot) Day
H. G. Greathead
Martin Donath
United States. Business and Defense Services Administration. Iron and Steel Division.
Sungho Kong
John S Hall
T. N. Irvine