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2
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Transport and sustainable development : a working bibliography / by J. Hans M. Opdam with Mirjan de Heus.
- University of Twente. Technology and development group,
- 1994.
- Enschede :
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Towards sustainable development : a liber amicorum for Enno W. Hommes / ed. by Margaret M. Skutsch, J. Hans M. Opdam and Nico G. Schulte Nordholt.
- University of Twente. Technology and development group,
- 1994.
- Enschede :