A mockup of Boeing Corporation's UTTAS (top) sits beside Army inventory UH1H Huey
U.S. Army
1972
<a rel="nofollow" class="external text" href="https://babel.hathitrust.org/cgi/imgsrv/download/pdf?id=mdp.39015080302352;orient=0;size=100;seq=743;num=57;attachment=0"><i>Infantry Magazine</i></a>, November-December 1972, Vol. 62, No. 6, Page 57.