An introduction to methods for the solution of ciphers ...
Contributors: George Fabyan Collection (Library of Congress)
Publisher: Riverbank Laboratories
Published: 1918
Place of publication: Geneva, Ill
Language: eng
Number of pages: 46
Subjects: Ciphers.
Notes: "Two hundred copies of this publication were printed."
J. S. Galland, Bibl. of cryptology, p. 67-68.