| 其他書名 | An Analysis of Past Trends and Projections of Future Changes |
| 出版 | United States Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1999 |
| URL | http://books.google.com.hk/books?id=c7QJHjHAxeMC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |