Mathematical recreations & essays
By: by W. W. Rouse Ball; revised by H. S. M. Coxeter.
Contributors: Ciphers.10 Coxeter, H. S. M. 1907-
Edition: 11th ed.
Publisher: The Macmillan company
Published: 1939
Place of publication: New York
Number of pages: 418
Subjects: Mathematical recreations; Geometry -- Problems, Famous; Cryptography; Ciphers
Notes:  0    "Copyright. First edition, 1892... Eleventh edition, 1939."

"References for further study": p. 410.

Bibliographical foot-notes.