1. Adams, J. J. (1982). Sinurlator dudy of ap'ctorial&& for aviation jhptrumuatfright (Tech. Rep. No. NASATP-1%3). Haqton, VA: NASALsngley Reaemch Center.
2. Aretz, A. J. (1991). The design of electmnic map displays. H w ~ n Foctws, 33,85-101.
3. Doughty, L. (1986). Shatiaral awareness Paper presented at the meeting of the Eastern Region Helicopter Council.
4. Perspective Traffic Display Format and Airline Pilot Traffic Avoidance