Two U.S. Marine Corps Sikorsky CH-37C <i>Mojave</i> helicopters aboard the U.S. Navy amphibious assault ship USS <i>Iwo Jima</i> (LPH-2), circa 1963.
U.S. Department of Defense
<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/ah196309.pdf">September 1963</a>, p. 22.