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S. P. Keeler, "Ductility of Anisotropic Sheet Metal." Presented at ASM Preweekend Seminar: Ductility Limitations, Utilization, and Exploitation, ASM National Metals Congress, Cleveland, October 1967.
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S. P. Keeler, "Rating the Formability of Sheet Metal." Metal Progress, Vol. 90 (October 1966), pp. 148-153.
S. P. Keeler, "Use of Grid Systems for Strain Determinations." Presented to International Deep Drawing Research Group Working Group I Processes, London, June 1964.
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