(1976). State of the Nation's Air Transportation System: Summary proceedings of a symposium, June 3-4, 1976. Washington, D.C: National Academy of Engineering.
Παραπομπή Chicago StyleState of the Nation's Air Transportation System: Summary Proceedings of a Symposium, June 3-4, 1976. Washington, D.C: National Academy of Engineering, 1976.
Παραπομπή MLAState of the Nation's Air Transportation System: Summary Proceedings of a Symposium, June 3-4, 1976. Washington, D.C: National Academy of Engineering, 1976.
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