"Appendix A: Chronology of U.S. Army Special Forces 15 April 1970 – 1 March 1971". U.S. Army Special Forces 1961–1971. Vietnam Studies. United States Army Center of Military History. 1989 [1973]. CMH Pub 90-23. Archived from the original on 12 February 2014. Retrieved 2 July 2010.
"Appendix A: Chronology of U.S. Army Special Forces 15 April 1970 – 1 March 1971". U.S. Army Special Forces 1961–1971. Vietnam Studies. United States Army Center of Military History. 1989 [1973]. CMH Pub 90-23. Archived from the original on 12 February 2014. Retrieved 2 July 2010.