Munur á milli breytinga „Fyrri heimsstyrjöldin“

* Halpern, Paul G., ''A Naval History of World War I'' (1995).
* Hardach, Gerd, ''The First World War 1914-1918'' (1977).
* PUSSSYYY
* Henig, Ruth, ''The Origins of the First World War'' (2002).
* Herwig, Holger H., ''The First World War: Germany and Austria-Hungary 1914-1918'' (1996).
* Higham, Robin og Dennis E. Showalter (ritstj.), ''Researching World War I: A Handbook'' (2003).
* Howard, Michael, ''The First World War'' (2002).
* Hubatsch, Walther, ''Germany and the Central Powers in the World War, 1914-1918'' (1963).
* Joll, James, ''The Origins of the First World War'' (1984).
* Keegan, John, ''The First World War'' (1999).
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