| 其他書名 | A Brief Description of the Geology of the Eagle A-1 and A-2 Quadrangles, a Part of the Fortymile Placer Gold Mining Country |
| 出版 | Department of the Interior, United States Geological Survey, 1969 |
| URL | http://books.google.com.hk/books?id=1eCKbx7tLh0C&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |