| 其他書名 | Issues, State-of-knowledge, Future Directions, Fort Collins, CO, July 23-26, 1985 |
| 出版 | U.S. Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1987 |
| URL | http://books.google.com.hk/books?id=2113mXCnoh8C&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |