Author
United States Army. Engineer Regiment, 29th
6
United States Army. Corps of Engineers. G.2.C
3
Belloc, Hilaire, 1870-1953
1
Dépôt de la guerre (France)
1
France Armée. Groupe de canevas de tir
1
France Corps d'état-major
1
Great Britain Ordnance Survey
1
United States Army. Corps of Engineers Regiment, 29th
1
Vermessungs-Abteilung 14
1
Vermessungs-Abteilung 19
1