Ngo, Quang Truong (1980). The Easter offensive of 1972(PDF). U.S. Army Center of Military History. Archived from the original on September 9, 2015. This article incorporates text from this source, which is in the public domain.
Ngo, Quang Truong (1980). The Easter offensive of 1972(PDF). U.S. Army Center of Military History. Archived from the original on September 9, 2015. This article incorporates text from this source, which is in the public domain.