sponsored by the Commission of the European Communities, Directorate General for Agriculture, Coordination of Agricultural Research ; edited by J-P. WatheletM. Nijhoff for the Commission of the European Communities1987
a conference organized by The Netherlands Institute of Transport ; supported by The Netherlands Government ; and under the patronage of OECD (Organisation for Economic Co-operation and Development), ECMT (European Conference of Ministers of Transport) ; edited by Evert J. Visser, The Netherlands Institute of TransportNijhoffc1977