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• K. Whitham
  Earth Physics Branch, Department of Energy. Mines and Resources, Ottawa, Ontario

• M. J, Berry
  Department of Civil Engineering and Engineering Mechanics McMaster University, Hamilton, Ontario

• A, C. Heidebrecht
  Department of Civil Engineering and Engineering Mechanics McMaster University, Hamilton, Ontario

• E. R. Kanasewich
  Department of Geophysics University of Alberta Edmonton, Alberta

• W. G. Milne
  Earth Physics Branch, Department of Energy. Mines and Resources, Ottawa, Ontario