When the U-boats came to America.
Clark, William Bell. "20th".255.110 = 2306E.30 When the U-boats came to America. — Boston. Little, Brown, & Co. 1929. xii, 359 pp. Portraits. Plates. Tables. 22 cm. Bibliography, pp. 313, 314. An account of the German submarine operations on the American coast in 1918,
 
This card was printed at the Boston Public Library, October 15, 1929. N6477 — T.r. — European War, 1 . Submarine warfare. — European War,
1914-1919. Germany. Navy. — European War, 1914-1919. United States. Navy.