- Created by: CWGC/ABMC
- Added: 8 Aug 2010
- Find A Grave Memorial 56757048
Find A Grave, database and images (https://www.findagrave.com : accessed ), memorial page for Capt William S O'Brien (unknown–4 Aug 1944), Find A Grave Memorial no. 56757048, citing Manila American Cemetery and Memorial, Manila, Capital District, National Capital Region, Philippines ; Maintained by CWGC/ABMC (contributor 6) .