Notes on Sources

Primary Sources

The NSA History Collection consists of manuscripts, memoranda, studies, and interviews related directly or indirectly to the cryptologic history of the United States. The extensive records in Series III (1919–39), Series IV, pertaining to the years of World War II, and Series VII, a special series, upon which I have drawn for my research were collected by former NSA Historian Henry F. Schorreck.

Also included within the files of the history program are important special collections of personal papers including those of William F. Friedman and Carter W. Clarke. These collections, however, have remained intact apart from the index system and have their own finding aids.

Other archival collections which have also proved ...

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