Diagram showing the different assets of the U.S. North American Air Defense Command in 1956.
U.S. Navy
<a rel="nofollow" class="external text" href="http://www.navy.mil/ah_online/department_arch.html">U.S. Navy All Hands magazine</a> <a rel="nofollow" class="external text" href="http://www.navy.mil/ah_online/archpdf/ah195609.pdf">September 1956</a>, pp. 32-33.