The value of time in passenger transportation the demand for air travel
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
New York
National Bureau of Economic Research
1970.
|
| Cyfres: | Occasional paper - National Bureau of Economic Research
109 |
| Pynciau: |