| 其他書名 | Photographs Written Historical and Descriptive Data |
| 出版 | Historic American Engineering Record, National Park Service, Western Region, Department of the Interior, 1990 |
| URL | http://books.google.com.hk/books?id=tTJ6AAAAMAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |