U-Boat Intelligence 1914-1918.
Hamden, CT: Archon Books, 1969. First edition 192 pp., 8vo. Hardcover in dj. First edition. Including b&w photos & charts detailing fresh analysis of intercepted signals. Slight shaking to spine but binding very sturdy. Sm po pen signature to title pg, otherwise textblock clean & crisp. Light scuffing & wear to dj. Fine in Very Good DJ Hardcover (Item ID: 158253)