^Thaddeus G. Bell: Probing The Oceans For Submarines -- A History of the AN/SQS-26 Long-Range, Echo-Ranging Sonar. Peninsula, Los Altos Hills, CA (U.S), 2010, p. 3. ISBN978-0932146267
^Thaddeus G. Bell: Probing The Oceans For Submarines -- A History of the AN/SQS-26 Long-Range, Echo-Ranging Sonar. Peninsula, Los Altos Hills, CA (U.S), 2010, p. 180. ISBN978-0932146267