Riverbank Publications No. 21 Methods for the Reconstruction of Primary Alphabets
Riverbank, Geneva Ill. Riverbank Laboratories Department of Ciphers 1918. First Edition. 14, [2-blank] pages. 28.5 cm. Provided in the originally issued Riverbank Laboratories button and string flapped manila envelope with limitation number on outside (sunned on one edge, crease). Individually numbered limitation of 200 copies (so stated on copyright page)..... More
