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2) H. S. Engell: NATO Science Committee Research Evaluation Conference, North Atlantic Treaty Organization Science Division, Brussels, p. 86, 1971.
3) R. W. Staehle: International Conference on Stress Corrosion Cracking and Hydrogen Embrittlement of Iron Base Alloys, Paris, France, 1973.
4) R. W. Staehle: NATO Science Committee Research Evaluation Conference, North Atlantic Treaty Organization Science Division, Brussels, p. 223, 1973.
5) G. T. Theus & R. W. Staehle: International Conference on Stress Corrosion Cracking and Hydrogen Embrittlement of Iron Base Alloys, Paris, France, 1973.