| usma.edu | Map Library, Dept of History, United States Military Academy |
| worldwar1.com | The Legends and Traditions of the Great War |
| rapidintellect.com | The Great War in the Classroom |
| ibiscom.com | EyeWitness: World War One |
| firstworldwar.com | First World War.com - A Multimedia History Of World War One |
| ntlworld.com | British and Commonwealth Mining Operations on the Western Front |
| bham.ac.uk | Centre for First World War Studies |
| wfa-usa.org | Western Front Association - United States Branch |
| westernfront.nl | The Western Front Museum |
| virginia.edu | University of Virginia Library - Joseph M. Bruccoli Great War Collection |
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