Online Books by

Thomas R. Johnson

• Johnson, Thomas R.: American Cryptology During the Cold War, 1945-1989 (4 volumes; declassified redacted version, published 1995-1999)
  • Book 1 (1945-1960): PDF at nsa.gov
  • Book 2 (1960-1972): PDF at nsa.gov
  • Book 3 (1972-1980): PDF at nsa.gov
  • Book 4 (1981-1989): PDF at nsa.gov

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