References
- British Road Federation . 1980 . Basic Road Statistics 1980 , London : BRF .
- Council for Mutual Economic Assistance . 1979 . Statistical Yearbook , IPC Industrial Press .
- Department of Transport (Annual) . Transport Statistics Great Britain , HMSO .
- International Road Federation . 1980 . World Road Statistics 1975–1979
- Lascelles , D. 1976 . Comecon to 1980 , Financial Times Ltd .
- Morariu , T. , Cucu , V. and Velcea , I. 1969 . The Geography of Romania , Bucureşti : Meridiane Publishing House .
- Office of Population Censuses and Surveys . Census 1971 , HMSO . (Various dates)
- Turnock , D. 1974 . An Economic Geography of Romania , Bell .
- United Nations . 1979 . Annual Bulletin of Transport Statistics for Europe 1978 ,
- World Bank . 1980 . World Development Report , The World Bank .