Benson, Charles D; Faherty, William B. "The Swing-Arm Controversy". Moonport: A History of Apollo Launch Facilities and Operations. NASA History Office. Archived from the original on 2022-10-04. Retrieved 2009-03-25.
Benson, Charles D; Faherty, William B. "The Swing-Arm Controversy". Moonport: A History of Apollo Launch Facilities and Operations. NASA History Office. Archived from the original on 2022-10-04. Retrieved 2009-03-25.