Round Table on Transport Economics Paris, France, & European Conference of Ministers of Transport. Economic Research Centre. (1978). Report of the thirty-eighth Round Table on Transport Economics held in Paris on 24th-25th March, 1977, on the following topic: Scope for the use of certain old-established urban transport techniques : trams and trolley buses. European Conference of Ministers of Transport ; sold by OECD Publications Center].

Round Table on Transport Economics Paris, France, a European Conference of Ministers of Transport. Economic Research Centre. Report of the Thirty-eighth Round Table on Transport Economics Held in Paris on 24th-25th March, 1977, on the Following Topic: Scope for the Use of Certain Old-established Urban Transport Techniques : Trams and Trolley Buses. Paris : [Washington, D.C.: European Conference of Ministers of Transport ; sold by OECD Publications Center], 1978.

Round Table on Transport Economics Paris, France, a European Conference of Ministers of Transport. Economic Research Centre. Report of the Thirty-eighth Round Table on Transport Economics Held in Paris on 24th-25th March, 1977, on the Following Topic: Scope for the Use of Certain Old-established Urban Transport Techniques : Trams and Trolley Buses. European Conference of Ministers of Transport ; sold by OECD Publications Center], 1978.