- International Federation of Operational Research Societies (7)
- International Conference on Operational Research (4)
- Haley, K. Brian (Keith Brian) (2)
- International Federation of Automatic Control (2)
- Association française pour la cybernétique économique et technique (1)
- Hertz, David B (1)
- IFAC/IFORS International Conference on Dynamic Modelling and Control of National Economies (1)
- International Conference on Transportation (1980 : New Delhi, India) (1)
- International Federation for Information Processing (1)
- International Institute for Applied Systems Analysis (1)
- Jaiswal, N. K. (1)
- Janssen, J. M. L. (Johannes Marinus Lodevicus), 1918- (1)
- Lawrence, Raymond John (1)
- Melese, Jacques (1)
- Operational Research Society of India (1)
- Pau, Louis-François, 1948- (1)
- Straszak, A. (1)
- Österreichisches Zentrum für Wirtschaftlichkeit und Produktivität (1)