- Maintained by: Find a Grave
- Originally Created by: War Graves
- Added: 5 Aug 2010
- Find a Grave Memorial 55956057
Find a Grave, database and images (https://www.findagrave.com : accessed ), memorial page for PVT Carl J. Sonnenberg (unknown–13 Oct 1918), Find a Grave Memorial no. 55956057, citing Meuse-Argonne American Cemetery and Memorial, Romagne-sous-Montfaucon, Departement de la Meuse, Lorraine, France ; Maintained by War Graves (contributor 6) .