Gerhard, William D.; Millington, Henry W. (1981). Attack on a SIGINT Collector, the USS Liberty(PDF). NSA History Report, U.S. Cryptologic History series (Report). National Security Agency. Archived from the original(PDF) on 30 October 2012. partially declassified 1999, 2003.
Gerhard, William D.; Millington, Henry W. (1981). Attack on a SIGINT Collector, the USS Liberty(PDF). NSA History Report, U.S. Cryptologic History series (Report). National Security Agency. Archived from the original(PDF) on 30 October 2012. partially declassified 1999, 2003.