| 其他書名 | Pacific Northwest Region Plan : Oregon, Washington and Portions of California and Idaho |
| 出版 | U.S. Department of Agriculture, Forest Service, Pacific Northwest Region, 1981 |
| URL | http://books.google.com.hk/books?id=x8zZheLwDvQC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |