AN/PPS-5A Ground Surveillance Radar
U.S. Army
<a rel="nofollow" class="external text" href="https://babel.hathitrust.org/cgi/imgsrv/download/pdf?id=uiug.30112075628294;orient=0;size=100;seq=88;attachment=0"><i>Infantry Magazine</i></a>, January-February 1973, Vol. 63, No. 1, Page 43