| 其他書名 | A Brief Digest of Research and Experimentation, Conducted by Railroads Individually and Collectively Through the American Railway Association ... |
| 出版 | Chicago, Ill. [etc.] American railrway association, 1934 |
| URL | http://books.google.com.hk/books?id=OHENAQAAMAAJ&hl=&source=gbs_api |