Battle of Liège (English Wikipedia)

FB 2008. "Liège". French Battlefields: Touring the Great Battlefields of Europe. Buffalo Grove, IL: French Battlefields. 2008. Retrieved 10 May 2014.

skynet.be

users.skynet.be

Vermeulen 2000, p. a. Vermeulen, J. (2000). "Belgian Fronts" [The Fortified Position of Liège]. Le Position Fortifiée de Liège. Archived from the original on 7 May 2013. Retrieved 10 January 2014.

web.archive.org

Vermeulen 2000, p. a. Vermeulen, J. (2000). "Belgian Fronts" [The Fortified Position of Liège]. Le Position Fortifiée de Liège. Archived from the original on 7 May 2013. Retrieved 10 January 2014.

worldcat.org

search.worldcat.org

Skinner & Stacke 1922, p. 6. Skinner, H. T.; Stacke, H. Fitz M. (1922). Principal Events 1914–1918. History of the Great War Based on Official Documents by Direction of the Historical Section of the Committee of Imperial Defence. London: HMSO. OCLC 17673086.
Edmonds 1926, p. 32. Edmonds, J. E. (1926). Military Operations France and Belgium, 1914: Mons, the Retreat to the Seine, the Marne and the Aisne August–October 1914. History of the Great War Based on Official Documents, by Direction of the Historical Section of the Committee of Imperial Defence. Vol. II (2nd ed.). London: Macmillan. OCLC 58962523.
General Staff 1915, p. 12. The war of 1914 Military Operations of Belgium in Defence of the Country and to Uphold Her Neutrality. London: W. H. & L Collingridge. 1915. OCLC 8651831.
Edmonds 1926, pp. 32–33. Edmonds, J. E. (1926). Military Operations France and Belgium, 1914: Mons, the Retreat to the Seine, the Marne and the Aisne August–October 1914. History of the Great War Based on Official Documents, by Direction of the Historical Section of the Committee of Imperial Defence. Vol. II (2nd ed.). London: Macmillan. OCLC 58962523.
General Staff 1915, p. 13. The war of 1914 Military Operations of Belgium in Defence of the Country and to Uphold Her Neutrality. London: W. H. & L Collingridge. 1915. OCLC 8651831.
Edmonds 1926, p. 33. Edmonds, J. E. (1926). Military Operations France and Belgium, 1914: Mons, the Retreat to the Seine, the Marne and the Aisne August–October 1914. History of the Great War Based on Official Documents, by Direction of the Historical Section of the Committee of Imperial Defence. Vol. II (2nd ed.). London: Macmillan. OCLC 58962523.
Buchan 1921, p. 134. Buchan, J. (1921). A History of the Great War. Edinburgh: Nelson. OCLC 4083249.
Edmonds 1926, p. 36. Edmonds, J. E. (1926). Military Operations France and Belgium, 1914: Mons, the Retreat to the Seine, the Marne and the Aisne August–October 1914. History of the Great War Based on Official Documents, by Direction of the Historical Section of the Committee of Imperial Defence. Vol. II (2nd ed.). London: Macmillan. OCLC 58962523.
Edmonds 1926, pp. 35, 41. Edmonds, J. E. (1926). Military Operations France and Belgium, 1914: Mons, the Retreat to the Seine, the Marne and the Aisne August–October 1914. History of the Great War Based on Official Documents, by Direction of the Historical Section of the Committee of Imperial Defence. Vol. II (2nd ed.). London: Macmillan. OCLC 58962523.