Riverbank Publications No. 17 An Introduction to Methods for the Solution of Ciphers
Geneva, Illinois: Riverbank Laboratories 1918. First Edition. [2],46 p. illus., tables, diagrs. 28.5 cm. One of 200 copies printed per printed limitation statement. Provided in the originally issued Riverbank Laboratories button and string flapped manila envelope with matching limitation number printed in red upper right corner (dusty, minor creasing/wear). Stiff..... More
