| 其他書名 | Seventh World Wilderness Congress Symposium, 2001 November 2-8, Port Elizabeth, South Africa |
| 出版 | U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2003 |
| URL | http://books.google.com.hk/books?id=hjPwAAAAMAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |