//-->
Metropolitan mass transportation
(1960)
Das Dokument des kombinierten Transports : ein neues Wertpapier
Helm, Johann Georg, (1977)
An economic analysis of Philippine domestic transportation
(1957)
Selecting and staring additions to a transport network
Roberts, Paul O., (1971)
The transport model
Roberts, Paul O., (1974)
Simulation of transport policy alternatives for Colombia
Roberts, Paul O., (1968)