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Mines. Military and naval. *"20th", 255M. 1=2306c.6 United States. Army and navy. Navy. Mine Squad- ron l, The northern barrage. Mine Force, United States Atlantic Fleet. The North Sea, 1918. Edited by all hands. Annapolis, Md. 1919, 127 pp. Illus. ,one colored. Portraits. Plates, Map. (The United States Naval Institute. ] 25 1/2 cm.