| collectionscanada.ca | Mary Riter Hamilton: Traces of War |
| geocities.com | My WW1 Summary |
| usma.edu | Map Library, Dept of History, United States Military Academy |
| fordham.edu | The Espionage Act, May 16, 1918 |
| firstworldwarlinks.com | First World War Links |
| firstworldwar.com | First World War.com - A Multimedia History Of World War One |
| bham.ac.uk | Centre for First World War Studies |
| eyewitnesstohistory.com | EyeWitness: World War One |
| btinternet.com | Fallen Heroes |
| ntlworld.com | British and Commonwealth Mining Operations on the Western Front |
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