U.S. Roland II air defense system concept
U.S. Dept of the Army
<a rel="nofollow" class="external text" href="https://babel.hathitrust.org/cgi/imgsrv/download/pdf?id=umn.31951002816187z;orient=0;size=100;seq=907;num=903;attachment=0">Hearings on military posture and H.R. 11500</a>, Written Statement of Hon. Martin R. Hoffman, Secretary of the Army, pt. 1, p. 903