Friedman Lecture Notes and Cards; Cryptograph and Cryptanalysis Go Back to the Dawn of Invention of Writing
Friedman Notes and Lectures, 31 Cards; Preparation of Slides
Lecture and Notes, William F. Friedman, Parts I, II, III, and the Influence of Cryptologic Power on History
Lecture Cards and Notes, for Lecture at U.S.M. A., 100 Cards
Lecture Note for Slide 6.8, 27 Cards; the Benedict Arnold Indecipherable Treasonable Cow Letter
Lecture Notes on Communications Security
Lecture Notes, Instances of Cipher In the Bible: Jerremiah 25:26 and 51:41, 71 Cards