| 其他書名 | Being a Study of House Document No. 105, Sixty-Second Congress, First Session, Based Upon the Original Data Supplied by the Railways and Used by the Postmaster-general and Upon Official Statistics |
| 出版 | Committee on Railway Mail Pay, 1912 |
| URL | http://books.google.com.hk/books?id=Au9CAAAAIAAJ&hl=&source=gbs_api |