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للتواصل Eqkawkab@gmail.com

المصادر : - https://www.history.com/news/what-was-the-zimmermann-telegram

https://www.bbc.com/news/uk-38581861

https://history.blog.gov.uk/2017/01/16/the-zimmermann-telegram-and-room-40/

A WORLD UNDONE(book)

War Finance and Inflation in Britain and Germany, 1914-1918 Author(s): T. Balderston

Confidence and Gold: German War Finance 1914–1918 Stephen Gross

THE ECONOMICS OF WORLD WAR I: A COMPARATIVE QUANTITATIVE ANALYSIS , Stephen Broadberry