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Miller, Matthew; Clifford, Mark L.; Zegel, Susan (August 5, 2002). "Dishonored Dealmaker". Bloomberg Businessweek. Archived from the original on August 6, 2002. Retrieved March 25, 2007.
Mindell, David A. (April 1995). "Anti-aircraft fire control and the development of integrated systems at Sperry, 1925-40". IEEE Control Systems Magazine. 15 (2): 108–113. doi:10.1109/37.375318. ISSN 1066-033X.