Flightglobal, Volume XI, Issue 48, No. 570, 27 November 1919, pp. 1524–1532; contemporary technical description of the original Dragonfly-engined Nighthawk with photographs and drawings.
Flight, Volume XI, Issue 48, No. 570, ngày 27 tháng 11 năm 1919, pp. 1524–1532; contemporary technical description of the original Dragonfly-engined Nighthawk with photographs and drawings.