Search results for: Robert W Simpson
Earth, Planets and Space > 2001 > 53 > 4 > 275-283
Journal of Air Transport Management > 1995 > 2 > 1 > 33-45
Earth, Planets and Space > 2001 > 53 > 4 > 275-283
Journal of Air Transport Management > 1995 > 2 > 1 > 33-45