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Clabby, John F.
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United States. National Security Agency/Central Security Service. Center for Cryptologic History.
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Schindler, John R.
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United States. National Security Agency/Central Security Service. Center for Cryptologic History.
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Perkins, John, 1945-
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United States National Security Agency -- Biography.
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Mannion, James.
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Government Job? -- A Short History of the United States -- How the President Is Elected -- State and Local
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