| 其他書名 | With Special Investigations Into the Iron Resources of the Republic and Into the Cretaceous Coal of the Northwest |
| 出版 | U.S. Government Printing Office, 1886 |
| URL | http://books.google.com.hk/books?id=dytRAAAAYAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |