Documents Related to the NSA
- Parker, Frederick D. "A Priceless Advantage: U.S. Navy Communications Intelligence and the Battles of Coral Sea, Midway, and the Aleutians." United States Cryptologic History, Series IV, World War II, Volume 5, Center For Cryptologic History, National Security Agency. 1993, online or mirror
- Parker, Frederick D. "Pearl Harbor Revisited: United States Navy Communications Intelligence
- 1924-1941." Center For Cryptologic History, National Security Agency. 1994, online or mirror
- Russell, Commander Jerry C. "Ultra and the Campaign Against the U-Boats in World War II." Studies in Cryptology, NSA, Document SRH-142. Record Group 457, Records of the National Security Agency, online or mirror
- "Synthesis of Experiences in the Use of Ultra Intelligence by U.S. Army Field Commands in the European Theatre of Operations." Studies on Cryptology, NSA, Document SRH-006, Record Group 457, Records of the National Security Agency, online or mirror
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