References
- CEC . 1989 . “ Transport and the environment—impact on the choice of infrastructure for the year 2000 and beyond ” . DG VII, Draft
- OECD . 1986 . “ Environmental effects of automative transport ” . Paris : OECD .
- OECD . 1988 . Transport and the Environment , Paris : OECD .
- UK Department of Transport . 1988 . International comparisons of transport statistics . Statistical Bulletin , 88 : 38