| 其他書名 | Operation and Maintenance Conference : Powell, Wyoming, November 10-13, 1909 |
| 出版 | Department of the Interior, U.S. Reclamation Service, Northern Division, 1909 |
| URL | http://books.google.com.hk/books?id=NzPxecmoWfQC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |