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Report / Second Air Transport Conference, Montreal, 12-28 February 1980
(1980)
Special Air Transport Conference
(1977)
Die Analyse der Zuverlässigkeit von Flugplänen
Franke, Peter, (1972)
The air transport industry : some economic aspects
Hammarskjöld, Knut, (1969)
La domanda di trasporto aereo 1980-1990
Hammarskjöld, Knut, (1973)