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3. Office, Chief of Ordnance, Ordnance Engineering Design Handbook, Elements of Armament Engineering, Part 2, Ballistics, Washington, DC (August 1960) (ORDP 20–107).
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5. Robertson, H. P., The Mechanics of Armor Perforation, I. Residual Velocity, National Defense Research Council (NDRC Armor and Ordnance Rept. No. A-227, OSRD No. 2043) (November 1943).