Riverbank Publications No. 50 : The Production and Detection of Messages in Concealed Writing and Images

by Riverbank Laboratories, H. O. Nolan

$275 · Offered by Kuenzig Books

First edition

Geneva, Illinois: Riverbank Laboratories 1918. First Edition. 20 pages 8 3/4 x 11 1/4 inches. 22.3 cm x 28.5 cm . Publisher's stiff tan wrappers with black printed front cover duplicating title page. Provided in the originally issued Riverbank Laboratories button and string flapped manila envelope with limitation number on outside. Individually numbered limitation of 200 copies so stated on copyright page . Binding post

• Binding: Wrappers

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