Twentieth annual symposium - AGIFORS, Airline Group of the International Federation of Operational Research Societies : New Delhi, India, September 1980
Annual symposium. Airline Group of the International Federation of Operational Research Societies (AGIFORS) ; 20 ; 1980 ; New Delhi Annual symposium. Airline Group of the International Federation of Operational Research Societies (AGIFORS) ; 20 (New Delhi) : 1980.09.
1980
629 S.
graph. Darst.
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