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3. Defense Metal Information Center, Report;H J Wagner,1965
4. Raymond, E. L.; “Effect of Grain Boundary Denudation of Gamma Prime on Notch Rupture Ductility of Inconel Nickel-Chromium Alloys X750 and 718”, Transactions AIME, Vol. 239, 1967, pp. 1415–1422.
5. Radavich, J. F.; unpublished research.