Cryptanalysis of the Shift Register Generated Stream Cipher Systems (C-39)

Medical Schools of the World Where Instruction Is Given in English

Cryptograms

Cryptanalysis of the Simple Substitution Cipher With Word Divisions Using Non-Pattern Word Lists (Cryptographic Series , No 2)

Cryptanalysis of the Double Transposition Cipher

Cryptanalysis of the Hagelin cryptograph

Cryptograms in Spanish (M-9)

Cryptanalysis of the Simple Substitution Cipher With Word Divisions (Cryptographic Series , No 2)

The history of codes and ciphers in the United States during the period between the World Wars

Cryptanalysis of the Single Columnar Transposition Cipher With Added Computer Program Written in Basic

The history of codes and ciphers in the United States prior to World War I