The origins of the National Security Agency, 1940-1952 Burns, Thomas L. creator author. United States National Security Agency/Central Security Service. Center for Cryptologic History, issuing body. text bibliography History. mdu 1990 monographic eng remote 1 online resource (vii, 159 pages) : illustrations. Thomas L. Burns. Originally classified as Top Secret. Declassified - minus certain passages - on September 8, 2004. "Approved for release by NSA on 03-02-2007, FOIA Case # 51510." Includes bibliographical references (pages 148-153) and index. n-us--- United States. Armed Forces Security Agency History Cryptography United States History 20th century United States. Armed Forces Security Agency. Cryptography United States 1900-1999 fast D 1.2:N 21/4 D 1.2:N 21/4 Origins of the National Security Agency, 1940-1952 Burns, Thomas L. United States cryptologic history. v. 1 Series 5 Early postwar period, 1945-1952 https://purl.fdlp.gov/GPO/gpo73503 ZCU 050128 20211120180955.0 in00003716582 eng