The Index of Coincidence and Its Applications in Cryptography : Publication No. 22 WITH L'indice de coïncidence et ses applications en cryptographie Publication No 22 (Traduction Francaise). [together 2 Volumes, Riverbank Publication]
Paris: Imprimerie-Librairie Militaire Universelle, L. Fournier 1921. First Edition. Publication No 22 (English): 87 pages; WITH Publication No 22 (French): 91 pages. 10 5/8 x 8 5/8 inches. Together 2 volumes. Lacking the rare English and French 8 page appendix inserts. Publisher's stiff tan wrappers with black printed front cover..... More
