Helen Reef (Radja Ampat Group) / prepared and reproduced under the direction of the Engineer Sixth U.S. Army, July 1944 による War Department Washington D.C. . Corps of Engineers U.S. Army

Helen Reef (Radja Ampat Group) / prepared and reproduced under the direction of the Engineer Sixth U.S. Army, July 1944

War Department Washington D.C. . Corps of Engineers U.S. Army

1944

[S.l.] : Corps of Engineers U.S. Army, War Department