Boeing Winged UTTAS concept, designed before the Army defined its requirement for the proposed utility aircraft to be conventional-type helicopter instead of fixed-wing one
United States Army, Combat Developments Command
1972
<a rel="nofollow" class="external text" href="https://archive.org/stream/arrowhead4019fort#page/4/mode/1up"><i>Arrowhead</i></a>, June 1972, No. 40, Page 4