| 其他書名 | A Report to the Office of the Secretary, Office of Systems Analysis and Information, Department of Transportation, October 1970 |
| 出版 | Department of Transportation, Assistant Secretary for Policy and International Affairs, Office of Systems Analysis and Information, 1971 |
| URL | http://books.google.com.hk/books?id=RHcgAQAAMAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |