| 其他書名 | A Report of an Investigation Conducted by the Engineering Experiment Station, Purdue University, in Co-operation with the State Highway Commission of Indiana |
| 出版 | Engineering Experiment Station, Purdue University, 1940 |
| URL | http://books.google.com.hk/books?id=OUdIpw9AurwC&hl=&source=gbs_api |