| 其他書名 | Present Indecision, Past Dominance, Future Complementarity : Paper Presented to the Urban Public Passenger Transport Workshop by Hugh Barr, 20th June 1979 |
| 出版 | Appliied Mathematics Division, 1979 |
| URL | http://books.google.com.hk/books?id=TDuQMgAACAAJ&hl=&source=gbs_api |