| 其他書名 | A Report of an Investigation Conducted by the Engineering Experiment Station, University of Illinois in Cooperation with the Public Roads Administration, Federal Works Agency and the Division of Highways, State of Illinois |
| 出版 | University of Illinois, 1943 |
| URL | http://books.google.com.hk/books?id=AgJMAQAAMAAJ&hl=&source=gbs_api |