Boek Artillery Operations of the Ninth British Corps at Messines, June, 1917 Uitgever Government Printing Office (1917) Taal Engels Serie War Department (647) Boek The Attack of the British 9th Corps at Messines Ridge Uitgever United States of America War Office (1917) Taal Engels Serie War Department (653) Boek Histories of Two Hundred and Fifty-One Divisions of the German Army Which Participated in the War (1914-1918) : Compiled from Records of Intelligence Section of the General Staff, American Expeditionary Forces, at General Headquarters : Chaumont, France : 1919 Uitgever Government Printing Office (1920) Taal Engels Serie War Department (905)