- History Department of the US Military Academy West Point. Northwest Europe 1914: The Stabilized Front, Major Offensives and Changes January 19156-December 1916. Map. U.S. Military Academy West Point. https://commons.wikimedia.org/wiki/File:Western_front_1915-16.jpg (accessed September 25, 2015).
- Unknown author. Loos: Attach of 21st & 24th Divisions up to 11.30 AM 26th September 1915. Map. Not dated. The Western Front Association, The Western Front Association on Flickr. https://www.flickr.com/photos/westernfrontassociation/8882550232/ (accessed August 28, 2015).
Jack Peirs
The First World War Letters of H.J.C. Peirs: A Digital History
