Changes

*[https://archive.org/details/greatwarhandbook0000brid_k1j2/mode/2up ''The Great War Handbook''] by Geoff Bridger 2013, first published 2009. Cover additional wording ''A Guide for Family Historians and Students of the Conflict''. Archive.org Books to Borrow/Lending Library.

*[https://archive.org/details/greatwarexplaine0000stev/mode/2up ''The Great War Explained : a simple story and guide''] by Philip Stevens 2012. Archive.org Books to Borrow/Lending Library.

*''History of the Great War based on Official Documents: Seaborne Trade'' by C. Ernest Fayle 1920 -1924. [https://archive.org/details/seabornetrade01char ''Volume I : The Cruiser Period'']; [https://archive.org/details/seabornetrade02char ''Volume II: From the Opening of the Submarine Campaign to the Appointment of the Shipping Controller'']; [https://archive.org/details/seabornetrade03char ''Volume III: The Period of Unrestricted Submarine Warfare''] Archive.org.

*''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 and had title on spine ''The Blockade of the Central Empires, 1914-1918''. 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.