| 其他書名 | A Photographic Study Using Comparative Photographs from 1902-1992 |
| 出版 | U.S. Department of Agriculture, Forest Service, Intermountain Region, Manti-La Sal National Forest, 1994 |
| URL | http://books.google.com.hk/books?id=bUH2LD5FvXYC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |