A method of reconstructing the primary alphabet
Subtitle: from a single one of the series of secondary alphabets ...
Contributors: George Fabyan Collection (Library of Congress)
Publisher: Riverbank Laboratories
Published: 1917
Place of publication: Geneva, Ill
Language: eng
Subjects: Ciphers.
Notes: Cover-title.
J. S. Galland, Bibl. of cryptology, p. 67.