TY  - BOOK
ED  - European Conference of Ministers of Transport.
TI  - Fourth International Symposium on Theory and Practice in Transport Economics: Economic criteria for the maintenance, modification or creation of public transport services which may not necessarily be profitable 
AV  - HE11 .I6 1971a
U1  - 380.5'1 
PY  - 1971///]
CY  - Paris
PB  - CEMT
KW  - Transportation
N1  - Cover title; Held 5th-7th October, 1971; Includes bibliographical references
N2  - This study is concerned principally with passenger transport, as befits a concern with urban and suburban transport
ER  -