| 其他書名 | Management of Competing Vegetation : Environmental Impact Statement |
| 出版 | U.S. Department of the Interior, Bureau of Land Management, Oregon State Office, 1989 |
| URL | http://books.google.com.hk/books?id=XQwI8Gwu0qAC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |