Seaborne trade.
Series: History of the Great War based on official documents
Publisher: Murray
Published: 1920
Place of publication: London
Subjects: World War, 1914-1918 -- Naval operations; Merchant marine -- Great Britain; Shipping -- Great Britain
Table of contents: title: The cruiser period.; title: 2.  From the opening of the submarine campaign to the appointment of the shipping controller.; title: 3.  The period of unrestricted submarine warfare.