Changes

*''Official History of the War: History of the Great War based on Official Documents''. [http://dspace.gipe.ac.in/xmlui/handle/10973/24853 ''History of the Blockade of Germany and of the countries associated with her in the Great War: Austria-Hungary, Bulgaria and Turkey, 1914-1918''] by A C Bell 1961 HMSO. Reprint of 1937 original edition, which was for official purposes only and was not generally released. Pdf download Digital Repository of GIPE, Gokhale Institute of Politics and Economics [Pune India]. Note, there are two downloads. The first download is an extract of 149 pages , consisting of Contents etc and Appendices, out of a total of 845 pages. The second download is the entire book.

*[https://archive.org/details/navalblockade00loui ''The Naval Blockade, 1914-1918''] by Lieut. Louis Guichard, French Navy. Translated and edited by Christopher R. Turner. 1930 Archive.org. The economic impact of the blockade.

*[https://archive.org/details/economicsocialhi07carn_0 ''An Economic Chronicle of the Great War for Great Britain & Ireland 1914-1919. With a Supplement dealing briefly with the years 1920, 1921 and 1922''] by N B Nearle 1929 Archive.org. A book in the series ''Economic And Social History Of The World War British Series''. Carnegie Endowment for International Peace.

*[https://archive.org/details/economicsocialhi09carn_0 ''The Consequences of the War to Great Britain''] by Francis W Hirst 1934 Archive.org. A book in the series ''Economic And Social History Of The World War British Series''. Carnegie Endowment for International Peace.