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Pre-WWII (Prior to 1941)

Below is a list of NSA/CSS historical publications. PDF or text file versions are available for most of the monographs and brochures. Printed copies of publications marked with an asterisk (*) may be requested from the Center for Cryptologic History via our online form.

Subject Title Author Date Available Format
Cryptology Masked Dispatches: Cryptograms and Cryptology in American History, 1775-1900 * Ralph E. Weber 1993 Monograph
Friedman The Friedman Legacy: A Tribute to William and Elizebeth Friedman* Center for Cryptologic History 1992 Monograph

Audio Files

Rumrunners A New Kind of Detective Work Patrick Weadon 2001 Brochure
Rumrunners Listening to the Rumrunners: Radio Intelligence during Prohibition * David P. Mowry 2014 Brochure
Revolutionary War Revolutionary Secrets: The Secret Communications of the American Revolution Jennifer Wilcox 2012 Brochure
Signals Intelligence Radio Intelligence on the Mexican Border World War I: A Personal View * Richard Egolf   Brochure
World War I Women Telephone Operators in World War I France Jill Frahm 2016 Article